You could be walking into just about any River North bar when you enter Downtown, with its flatscreen TVs, low lighting and sophisticated sensibility. You may or may not realize that you’ve just walked into the closest gay bar to the Loop. Expect an older, professional, male-dominated clientele to gather here for a drink after work. But they don’t stay quite so buttoned up as the drinks start flowing, especially during the underwear parties on the second and fourth Friday of each month.