The Pimp is in the room behind the Naughahide door in Lefty's Bar. He will not let Larry proceed to the Hooker's room. Larry distracts him by changing the TV to a porn channel.
Behind the scenes[]
Sweetwater is probably based on the pimp from LSL1SCI. The pimp in WDDD is possibly inspired by this pimp or by the later Prodigious P.