Our school has an aerobic studio, which is a dance studio. Fancy wood floors, full wall of mirrors, surround stereo, it was great. Then they started charging us $5 per person for every non-current-student which was half our team, and the people working there started being bitc#y and mean to us and stuff... Basically the lady in charge hated us for silly little reasons, and started placing all these restrictions and rules on us and stuff...
Now we go there only if we really need to. Our regular practice spot is a conference room/banquet room on campus. It's about the size of two high school classrooms, and one whole wall is glass so we can look at our reflections if we want to. Open space, and it's pretty private we can close the doors and we aren't much of a disturbance even with Dushmani blaring on full volume, haha
In past I've also practiced on basketball courts, which works out alright.