Carbon (ex-Callaghan's Irish Bar), Piccadilly
Regents Palace Hotel, Piccadilly, London, W1B 5DN
From Piccadilly Circus: Take the Regent Street North exit and you come out in Glasshouse Street. Turn left and it's 50 meters up on the right. From Oxford Circus: Take the Regent Street South exit and head down the street. You want to be on the left hand side of the road and turn left into Glasshouse Street. Carbon is about 50 metres down on the left.