Conversation so far:
when did the Late Night with Conan O'Brien debut?
O'Brien's Late Night debuted on September 13, 1993, with Andy Richter chosen as O'Brien's sidekick.
who was the first guest on Late Night with Conan O'Brien?
The premiere episode featured John Goodman, who received a First Guest medal for his appearance, Drew Barrymore, and Tony Randall.
how was theLate Night with Conan O'Brien show first received?
Critics initially attacked O'Brien and generally viewed O'Brien as nervous and fidgety on-camera.

Question: who was the band in the debut?
Self-contained rewrite: who was the band in the debut episode of Late Night with Conan O'Brien?