At their best, flea markets offer the chance to score some real finds at bargain basement prices. At their worst, they offer the chance to sift through a lot of junk. Taking place today from 1 to 6 p.m. at Now That's Class, Crack Gardens Flea Market is so unstructured, it's hard to say what you might find. "The only rules are that there aren't any rules," boast the promoters. Even if you don't find anything worth buying, the club will offer up vegan food specials and "sassy" drink specials. Admission is free. (Niesel)