Factory Theater sometimes seems obsessed with doing plays about groups of neurotics united by their obsession with some facet of pop culture (The Vinyl Shop, Win, Place, or Show). Now it's doing George Brant's latest--about a gaggle of Bob Dylan fans hanging out in a bar before one of their idol's concerts. Such stories always risk falling into the who-cares category, especially if you don't share the characters' enthusiasm. It clearly helps to be among the initiated to fully appreciate Brant's dialogue, but most of the time he does a nice job cluing the rest of us in. And in a passionate speech late in the evening one character makes a persuasive case for why Dylan matters. Through 8/21: Fri-Sat 8 PM, Sun 7 PM. Prop Thtr, 3502-4 N. Elston, 312-409-3247. $12-$18.