Check out The Blues Room. It's a new all night (at least till 4:00 AM) venue at 146 Tongren Lu, right off Nanjing West. Really hot band and very friendly. We are a couple of American music nuts-- were walking by around 11:00pm and were attracted by the great blues sounds emanating. We stayed all night. The best part was when all the other clubs in town closed, their musicians come over and it turned into an amazing jazz jam till deep morning. We went back, and apparently this happens every night. It opened recently-- downstairs from the 24-hour restaurant City Diner. Fun scene, especially if you love great music--and the food we ate (Southern BarBQ style) was very good.