Dramatic Universal Movement (D.U.M.) is a troupe of local playwrights, actors and musicians who will be putting on a fresh, politicized evening of sketch comedy at the Vortex starting this weekend. I'm told the evening will be filled with subliminable messages about the current screwed-up state of our nation. I'm also told the performance will be distinctly bipartisan. Everyone's getting skewered in this one. If you're looking for something a wee bit different, George W. D.U.M . runs Fridays and Saturdays at 8 p.m., and Sundays at 6 p.m. $10 general, $8 students/seniors. 247-8600.