One of the most popular bars in Busan for the past several years. Great Korean staff. They offer live music, pool and hookahs. Tuesdays feature an open mic; Wednesdays, German-reggae; and DJs blast each Thursday and Friday. Live music usually takes the Saturday slot. For food, try the excellent Nachos Grande.
Check out their Facebook page.
To get there: Head towards the main PNU gate, make the second-to-last right turn before you get there and head upstream on the one-way street. Look for it on the right side about a block down.