I was going to write a whole poem about it telling u the pros and cons....but then I got lazy.....and the pros didn't seem to be many so here.
I went to MB2 in Hongdae and what I learned is:
- don't go there alone...u won't be safe
- don't wear clothes that are too revealing (short pants included) 
- Koreans don't care what u look like as long as you're a foreigner (they're especially into white+blonde) what's their deal srsly.... so pls be careful...
- they don't go there to dance (at least not most of them) they're looking for a hook up so if a boy is being nice to you....just be careful with them, k? 
- SERIOUSLY! for the 2nd time TAKE A FRIEND WITH YOU AND DON'T GO ALONE (Why? Cause in the club 5 guys held me back and 10485759 others just touched my arms or just bumped into me intentionally *c'mon like...I know when u're just pretending*)