Taffey is the dude who owns the nightclub where Zhora works as a dancer. He appears for a brief moment in which he chats with Deckard and refuses to give him any useful information.
Interesting fact about this character: Ridley Scott is an infamous perfectionist, asking for take after take from his cast and crew. The scene with Taffey? They only needed one take, a fact for which actor Ty Pike was very proud. (Source)