The most popular after-dark activities in Monteverde are night hikes in one of the reserves and a natural-history slide show. However, if you want a taste of the local party scene, head to La Taberna, which is just outside of downtown Santa Elena before the Serpentarium. This place attracts a mix of locals and tourists, cranks its music loud, and often gets people dancing. Alternatively, Flor de Vida, Lazy Frog Café, Kaffa Café Art and Moon Shiva sometimes feature live music or open-mic jam sessions.
You'll certainly want to check to see if there's any live music or other performance at the Monteverde Amphitheater, a beautiful open-air performance space, located up a steep driveway up from Stella's Bakery, next to Bromelia's. However, be forewarned: The concrete seats here are uncomfortable, so try to bring something soft to sit on.