Most bar staff in Sapporo speak limited English, but they go out of their way to make you feel welcome. These bars are clustered close to each other in Susukino, Sapporo's main entertainment district. In fact, you can go to one place, the No. 6 G Building, formerly the SA Building, and there are gay bars on different floors.
Expect to pay a "Charm Charge" (or table charge) of at least 1,000 Yen per person on top of your bill.