Roppongi 3-11-10. [on Roppongi-dori south side, at the corner of Gaien-Higashi-dori] Open 6-10:50pm (LO). Closed Sundays and holidays.
This friendly little bar serves around 100 beers on the regular menu, plus additional seasonal beers that aren't listed, so check the display case before you order. There's also a full food menu.