>> Should you expect crappy service at the Black Cat tonight, when they’re advertising a party celebrating their 14th anniversary tonight as an event where staffers “will be hanging out?” Maybe. But it’s a free night of noisy rock bands, and you know the guys and gals who pour your drinks night in and night out deserve some appreciation. Backstage, 8 p.m. >> Def Jux artist Aesop Rock has been redefining hip-hop since the…