Trinity Bar Harrow just ooooozes good vibes :-) if it isn't the drink prices that have you drooling... it'll be the music!!! (Notice: if it's mainstream you're after, this MIGHT be the wrong place :P).
Couple that with awesome staff and security and you've got a real recipe for success. Did I mention it's 3 mins from Harrow on the Hill station?

Trinity Bar is getting 5 bags of popcorn from me.. after one visit you'll see why.