La Lagune in Cheyres (15 minutes from Yverdon, VD):

Forget Switzerland for an evening in this very Carribean atmosphere on the shore of Lac de Neuchâtel: beautiful restaurant, huge terrace, playground for children, dogs welcome.
Every Friday and Saturday evening:
- All you can eat buffet, just amazing: barbecue, a la plancha, mediterranean buffet (warm and cold), sea food, paëlla, sushi etc,
- Live music by 2 Cuban musicians

CHF 42.- per person (drinks not included), but book well in advance!