Bar Rouge is located in the Messeturm and is a bar and disco.
The Messeturm (Mass Tower) is, at 107 meters, the highest building in Switzerland and one of the new "highlights" of Basels Skyline (so the builders say). I think it's more a klutz.
In the tower on the 31st and 30th floors, there is the "Bar Rouge". During the week, the entrance is free. On weekends they do have special attractions like "Latin Night" or so, and then it costs.
What is special here are the toilets. Entering your toilet cabin, you have a wonderful view right over the city, since the windows go from the ceiling to the floor. Nothing for people who are afraid of heights (and if you know where to look, you could be able to see some small people sitting on the toilet, since the windows are not mirrored - but it is quite high up, so you will not really see much).
Opening times:
Monday to Wednesday 5pm-1am
Thursday 5pm-2am
Friday and Saturday 5pm-4am
Sunday 8pm-1am
(Thanks to my friend Tea for the picture--he made it with a handy, so never mind the quality.)