The comedy show had two comedians in June, with each doing a set of around 20 minutes with the whole show being about 45 minutes as I recall. That was it for the comedy club. The venue is small so they have to offer the same program several times to accommodate the crowd.
The 'headliner' showtime in the main showroom might have a comedian too but that is cruise-dependent. On our Oasis cruise the headliner was some singer I've never heard of.