Les Diablerets, Switzerland

Les Diablerets isn't very big or flashy and there's only a few hotels. I get the feeling skiers come up for the day and then return home. The chalets dotting the hillsides aren't fancy and the shopping street very small-townish but, there's a nice relaxing feel to the place. Good walking opportunities.

Is this place hopping or is it dead in the summer?
Not much going on.

Is there a lake and/or golf course in town?

Arriving by car the only option?
Train service to Les Diablerets from valley floor.

Does the place feel claustrophobic?

Lots of choices for acccomodations (hotels/ chalets) and do I have recommendations?
Only a few hotels to choose from but, I imagine many of the chalets are for rent.

Could I spend a whole summer here or would I get bored?
Two weeks max.