One of my favorite places in Stockholm both for a (read quite many;)) drink at the bar at night and for dinner! I can recommend both take an appetizer and a main course if you still are here.
In the evening turns to night rather than a & bar where it always is pulse and lots of lovely people. Vassa Eggen works nicely both if you are a bunch who want to hang out and talk, or if you feel like creating your own (though small) dance floor at the bar. Try their whiskey sour!