Sonar has this pretty cool punky feel(I'm thinking it was only at the clubstage) that I dont get at places like 930 when I go there. But I've been there only twice. I think it has the coolest location too. Directly under a bridge in a deserted street ghetto 5 blocks away from the harbor in Baltimore. But if you have to take a shit I wouldnt recommend it at sonar. And the place can actually manage festivals quite well.