Although Leysin is not usually the most hedonistic spot for nightlife, the 10 or so bars can certainly hold their own and can get lively when the younger crowd is in town. Alternatively there are several quieter lounge bars.
When the slopes close The Cable Bar (+41 (0) 79 769 57 19) is often the first stop for many as they leave the slopes and thus a popular après ski spot. The Leysin (+41 (0) 24 494 23 15) is also popular and sometimes has live music.
For something a little more laid-back and indeed slightly surreal, we found the oriental themed Davinda Lounge (+41 (0) 24 494 23 70; davinda-lounge.com) a great place to relax.