I Am Blessed 16 said:When you plop money down at the mall, movies, plays, concerts, for music, fast food, big gulps, etc., you KNOW you will get something in return. You are not taking any chances...
Among the specifics you mentioned, movies, plays, and concerts do not get you anything tangible, just something you wanted to see, hear, or experience. Gambling could be the same in that way. Besides, these entertainment exhibitions do sometimes have drawings or door prizes; and also many people collect ticket stubs, programs, et al, hoping an event they have some token of having attended may prove valuable in the future [a quick check on ebay shows someone trying to get $49.99 for a ticket stub for one of Elvis Presley's last concerts]. If it's enabling something of a more evil nature, there's certainly a good chance you're doing that with entertainment and shopping; so many performers marry multiple times, get caught for drunk driving or being stoned, and in general they're pompous with all that wealth and recognition, so much that they hire their own bouncers to accompany them and keep them away from those who idolatrize them.
If gambling is really just a form of amusement or entertainment, how is it really different from what you mention?