As this post is directed toward me, the OP, I would like to hear your response to the second part of my question.
Joe
Ok, thank you for letting me know.
A Roman Catholic 'Mass' will vary slightly depending on the season (like 'Lent', 'Advent', 'Easter', 'Ordinary Time', &c.), the location (country (u.S. or in Rome or Africa, South America, &c.), and building, whether Cathedral or not) and several other factors, such as 'High' or 'Low', 'Tridentine', 'Latin', 'English', &c.
The gatherings are generally cordial and orderly with Ushers doing their part to seated locations in pews (long rows, normally) with kneeling areas (sometimes), and there is often a 'Cantor' leading the singing, and other refrains, and sometimes a choir (could be of monks, nuns, &c.). There is generally areas for specific prayers before candle-lit altars, and places on the walls for images / icons, crucifixes, stations of the Cross, &c. In the view at the front will be the main altar behind which is the 'tabernacle', "Ciborium", &c. in which the 'host / eucharist' is kept, and is lighted when the 'presence' is there.
There will be 'liturgy' (actions / functions) of the bishop, assisting priests, altar boys / girls, &c. which will often include the audience as well in kneeling, standing, praying, singing, welcoming, lining up to receive the 'elements' ('bread' & 'wine' outwardly in appearance but said to be 'transformed' into the 'body, blood, soul and divinity' of the LORD Jesus upon consecration by the presiding leadership).
There will be various readings, generally one reading from the OT books, one reading from the Psalms, one reading from the NT Epistles, and one reading from the Gospels, which more or less, align to a thematic overview, and in my opinion is the better part of the service. Generally following those things, the presiding leadership will usually expound upon the central theme of those readings as is done in most other denominations.
Other places, such as the auricular confessional booth / box are present as well, and oft times other rooms, for infants, or catechumen / initiates, etc take place. In larger places there is usually an organ played, or simple choir singing.
There is repetition by the congregation in certain respects, and set times for 'Amen', 'and also with you', or a 'Kyrie eleison', at each 'Mass'.
There will often be stained glass windows of various 'God', 'Jesus', "holy Spirit', 'angels', 'saints' or 'events' in scripture or 'history' presented, or frescoes or paintings of such.
If the place is a an actual dedicated Cathedral (Place of the Chair / Seat / Throne), it will also have a specific relic (bone, blood, hair, wood, &c) in it, in, at or under the main alter, as well as have dead corpses buried in it. Some Cathedrals, as in Europe, are open floored and have no major seating as such, and is for standing, kneeling only.
There are good and bad elements to it.