I am only familiar with Nico's when they have their Saturday night karaoke, but the merits of that alone solidify the place in my heart. It attracts a diverse crowd, from locals that primarily sit in the main bar area, to a quintessential hipster crowd. I was actually just there last night, and my friends and I noticed how the crowd has gotten more and more hipster as the months have progressed.
Fair warning: the guy who runs karaoke is somewhat lame. After every song, he will say "all right!" or "good job!" in a cadence that demands to be imitated. Additionally, he seems to have some favorites amongst the regulars, particularly one woman who I have seen butcher "Me and Bobby McGee" every time I've been there.