In post #13 you mention an entity 13 times, "the 120".
I can count at least 18 NT references to "the twelve" and at least 5 NT references to "the eleven" but no references, OT or NT, to "the hundred and twenty".
"The 120" is strange fire.
That’s not an argument against the clear statement in Acts 1:15:
At this time Peter stood up in the midst of the brethren (a gathering of about one hundred and twenty persons was there together), and said...
You are trying to use the frequency of terms to undermine a clear statement of scripture. Are you also going to attack Paul’s statement that Jesus appeared to 500 believers at once?:
...and that [Jesus] was buried, and that He was raised on the third day according to the Scriptures, and that He appeared to Cephas, then to the twelve. After that He appeared to more than five hundred brethren at one time, most of whom remain until now, but some have fallen asleep... — 1 Corinthians 15:4-6
Haven’t you noticed in this passage that Paul refers to Jesus appearing to Peter, “then to the twelve” — this was after the death of Judea and before the selection of Matthias, so there were only eleven of the primary disciples (aka, “apostles”) of Jesus alive at the time. Paul is either using “the twelve” in a symbolic way or is counting Matthias with the eleven at the time since he would eventually take that position after the ascension of Jesus.
People often forget that Jesus walked around with many more disciples than just the Twelve. The Twelve symbolized the 12 Tribes of Israel traveling with YHWH through the wilderness. There were many other with Jesus, such as the women who followed Jesus (see Luke 8:1-3) and those who had walked with Jesus from His baptism onward, like Joseph/Barsabbas/Justus and Matthias:
Therefore it is necessary that of the men who have accompanied us all the time that the Lord Jesus went in and out among us— beginning with the baptism of John until the day that He was taken up from us—one of these must become a witness with us of His resurrection.” So they put forward two men, Joseph called Barsabbas (who was also called Justus), and Matthias. — Acts 1:21-23
Moreover, Jesus sent out 72 or 70 disciples to preach the Kingdom of God with attesting miracles recounted in Luke 10:1-20. So there were more than the Twelve who were performing miracles and announcing the kingdom.
So you insistence that it was only the newly-formed Twelve preaching and participating in the miracle of Pentecost based on your “strange fire” analysis of scripture is short-sighted and does not take into account a lot of obvious biblical evidence to the contrary.
...how do 120 fit into a house or room?
It depends on the facility and how crowded it was. Jerusalem undoubtably had places to rent or homes large enough to hold events. The culture had weddings and bar mitzvahs on a regular basis, so there would be a need for these kinds of places. Your objection is based on a lack of imagination and a rejection of Luke’s clear statement in Acts 1:15 that there were 120 people there. Rejecting the parts of scripture that you find inconvenient for your theology will only lead to ruin.
For certain "the eleven" were in the room at Jerusalem:
12 Then did they return to Jerusalem from the mount that is called of Olives, that is near Jerusalem, a sabbath`s journey;
13 and when they came in, they went up to the upper room, where were abiding both Peter, and James, and John, and Andrew, Philip, and Thomas, Bartholomew, and Matthew, James, of Alphaeus, and Simon the Zelotes, and Judas, of James; Acts 1 Young's Literal Translation
Verse 14 names some of the women who were there, along with the mother of Jesus and His brothers. And verse 15 tells us that there were 120 persons (literally “names”) there.
Pay attention to how Luke has described this. He was a very careful writer and only includes specific elements such as names and number when it is relevant to something before or after. He wanted us to know that more than the 12 were present, so he describes the other AFTER the Twelve. The last number that was mentioned before the miracle of Pentecost was 120, not 12. By the way, you realize that in biblical symbolism 12 symbolizes faith while 10 symbolizes perfection, harmony, creation and wholeness. When God have the Law, He gave 10 Commandments, as well as more than 500 other laws. Therefore 120 is a symbolicly meaningful number (12X10=120) for a moment where God does something new in the giving of the Spirit.
While 'the eleven now the twelve' are not specified here...:
1 And in the day of the Pentecost being fulfilled, they were all with one accord at the same place,
2 and there came suddenly out of the heaven a sound as of a bearing violent breath, and it filled all the house where they were sitting, Acts 2 Young's Literal Translation
...neither is an entity called "the 120".
That’s correct, but Luke’s carefully written context — as well as the participation of people other than the Twelve in miracles before and after this — gives us the most natural reading of the passage to be that 120 persons experienced the tongues of fire and began to prophesy.
'The eleven now the twelve' is again specified here:
13 and others mocking said, -- `They are full of sweet wine;`
14 and Peter having stood up with the eleven, lifted up his voice and declared to them, `Men, Jews! and all those dwelling in Jerusalem, let this be known to you, and harken to my sayings,
15 for these are not drunken, as ye take it up, for it is the third hour of the day. Acts 2 Young's Literal Translation
Sure, this proves my case. Luke has to tell us that it is now only the 12 (Peter plus the other 11) who are speaking, since he previously had told us what happened with the 120.
But no mention of an entity called "the 120".
Luke has made it extremely clear and even given you the specific number of 120. Why can’t you accept the plain meaning of the scripture?