There's no escaping La Folie Douce. These piste-side après-ski bars are notorious for building nightclub atmosphere in broad daylight. Around 2pm, follow the gleeful whoops below the top of Plein Sud lift, plant a bottle of rosé in the snow, sway with cyber-costumed dancers, stomp boots to the rhythms of the resident DJ, and emerge dazed, wondering how it's only 5pm.
There's also a good restaurant, La Fruitière, on-site.