Ten Degrees Bar
121 St. Marks Place (btw Avenue A and 1st Ave.)
Casual Bar $$
Happy Hour: everyday 12pm-8pm, 2 for 1 drink specials, Mondays 1/2 price wine bottles
Casual bar in the heart of East Village with an amazing everyday happy hour. It's a really popular spot for private events, so if planning to go with a group I would shoot them a call.