Über-sleek Oslo has been converted into the "Moulin Rouge" meets gypsy-caravan meets Atari Betsy's Bar and the more upscale, sleek, DJ-playing, open-iPod-nighting, closed-Mondays-and-Tuesdays lounge Hi-Lo (which is connected to Betsy's by an internal door, though they're separate bars). When we arrived at 10 p.m., the choicest couches and overstuffed velvet chairs were ours for the taking and...