G2 (where the old Monster Bar was located) is having their 'May Party'. Looks like it could be fun.
Circuit will be hosting a Saturday Night Fever party featuring K-pop. I love their poster:
Bar Viva in Jongno has two events. At 9:30, it is their 8th Dance Battle Party and starting at 9:30 they are also having a K-pop party focusing on girl groups.
Sunday at 2pm you can see the musical Drag Queen at a discounted price through the Korean Queer Culture Festival. There may still be some 20,000 won tickets left...