When I am not in school, I like to watch theatrical performances at my local community theater.
That's great and so much fun.  What's it like?
Just imagine a giant collaboration between community members.
How many members are typical for the theater?  I am sure it varies though.
Your right, sometimes they are small groups led by one person, and sometimes they perform in large well equipped spaces. It all varies.
Are there musicals, drama, etc?
Yes, they mostly do plays on gender equality, human rights, and the environment. Mostly social problems that deserve more attention.