Quite close to exit3 of metro no.3 at Jongno-3-ga station, this building is on the one end of Jongno gay tent bar street.

Cute bar owner serves nice cocktails priced from 6k krw to 10k krw. Also beer and other liqueurs are available.
Open at 7:30 until after midnight like many other bars nearby. Large space with 6 tables and counter. Interior is quite neat and pretty.
Not sure if bar staffs speak good English but I saw some English speakers hung around at this bar so it should be okay with basic English communication here. [Update] Heard bar owner speaks quite good English so if you're from English speaking country, you should come here.
Free wifi is provided.
ps. Just found out one of the bar staff here speaks fluent Japanese. This bar staff used to live in Japan. So I you're from Japan, you should drop by here.