Here's the skinny if you need someplace to be tonight if, for instance, your roomate is going to have guests over you don't particularly like and you figure they'll end up rummaging through your fridge and you're the kind who likes to avoid confrontation.
Friday's options include out-of-towners Screaming Females and JEFF the Brotherhood playing with The N.E.C. at 529; The Biters as one of the opening acts at The Earl; much-hyped Floridians Surfer Blood at The Drunken Unicorn with Turbo Fruits (an "everything but the girl" version of Be Your Own Pet), Carnivores, and Holiday Shores; and The Doppel Gang's final show ever at The Highland Inn, where they surprisingly start shows at a decent hour.
Saturday has a couple of album release parties, with Dead Rabbits releasing their newbie at Wonderroot and The Booze celebrating another album at Center Stage with The Biters, Tres Bien (I like those guys a lot), and Muddy Waters Jr., who will have The Booze as his backup band. Center Stage should be packed, as if The Booze can pack The Star Bar which is 21+, they shouldn't have trouble drawing at an 18+ venue.
I hate being that guy who promises he'll come to people's shows and then doesn't (don't you hate that, K-Holes and Facehugger?), so no promises as to what I might go and see tonight and tomorrow.