bulldog's is closed down. just go to itaewon or hongdae and get a taxi back. gangnam is lame
Bulldog closed? When did that happen?
Woodstock is usually open. Kathy is open still I think. Goose Island Brewhouse? Search for '강남역 혼술집' on Naver and see what pops up.
If you're by yourself, just go to a hotel bar. Is your AirBnB like a legit residence? Get a few cans of brew and watch some tv. Or did you couch surf in someone's hovel? In which case, this is why you stay in hotels- the hotel bar. Stop traveling like a bum.