You could spend every night drinking in Verbier at Farinet in its collection of bars/clubs and venture nowhere else. Some people do. It is in the centre of town and pretty much anyone who is anyone passes through.
The action starts off in the Apres with bands playing to the assembled masses. It is usually not long before people are up on the tables in various states of undress singing along to classic rock cover versions. Think St Anton.
Next door is the quieter lounge bar with its sofas and cocktails, and if you still have energy later in the night then the Casbah nightclub in the basement goes on until 4am.