Life-drawing aficionados usually sketch any body they can find. Few people, after all, have the right personality to disrobe so that a crowd can scrutinize every shadow and wrinkle. For more interesting models, try Dr. Sketchy's Anti-Art School. The invention of Brooklyn burlesquer Molly Crabapple, it's shown up in Denver under the auspices of local burlesque belle Vivienne VaVoom. Every third Monday of the month, VaVoom dishes up a heady mix of exotic-dancer mannequins, roller-derby girls, fetish models, drag queens and cocktails. All you need to bring is $8 and a sketch pad.