CMSA has a very good volleyball club(s). My geography professor and a few of my friends are in it(indoor at the moment). They have a variety of teams playing ranging from competitive to "I'm just playing for fun/shits&giggle" ...which is the category I would probably be in haha. I'm not too sure where they play at, either at the Center on Halsted or at the Broadway Armory(I've never been to, but it looks massive)
If you are going to play Volleyball, there are two leagues. I believe the CMSA is on Sunday. The Tuesday night is the WCAA. The Sunday league has more teams and the competition is better. They also do a beach league on Fridays during the summer. If you are BB then there is never a shortage of teams to play on. If you are A or higher then you will be playing with the same people, every time.