Try approaching L'Equipe or TJs for a Quiz Night. They are always keen on extra business and can be persuaded to offer free drinks. For speciality evenings, Le Kalico in 1850 can seat up to 100 for fondue, raclette or hot-rock. Other popular options include Skidoos, parapenting, ice skating, tobogganing, bowling, snowboarding lessons and a race day. The extra distance also makes a trip to Val Thorens a great option.
Guests can ski over there and then catch a bus back at the end of the day.
Alpe Evasion in Moutiers can help with booking coaches. If you work a winter in Courchevel, where you live can have an impact difference on your season. For example, if you live in Le Praz, you'll probably end the season knowing most other workers in the village plus a number of the locals. If you live in 1850, most bars you go to will be full of other season workers, many of whom you will never even meet, let alone know their name. That said, living in 1850 has to be the best option, with Le Praz a close second.