A twentieth-century comedy club recreated on the Enterprise-D holodeck, where Data tried to learn how to be funny from a holographic stand-up comedian.
Charnock's Comedy Cabaret is a holodeck setting in the Next Generation episode The Outrageous Okona.
Puzzled by the jokes of the visiting rogue Thadiun Okona, Data decides to study humour. Guinan goes with him to the holodeck, where he asks for a master of the art and is given a brash club comedian, who coaches him in routines and impressions.
Data later performs for a holographic audience that roars with laughter. He soon notices that they laugh at everything he does, however flat, and understands that they have been programmed to. He leaves disappointed, though Guinan assures him that not being funny does not make him any less a person.