When most people come to NBC Studios, it's not to take the studio tour, but because they want to be a member of the studio audience of "The Tonight Show", now starring Conan O'Brien. Not only will you see Conan live, but you also have a chance to see movie & TV stars in person, plugging their latest releases. Perhaps Bill Cosby or Jerry Seinfeld will be doing a stand-up comedy routine. Or you may even get to hear your favorite group perform a live musical number You also have the opportunity to watch all of the behind-the-scenes action at the studio, without commercials or editing. (Admit it, haven't you ever wondered what goes really goes on when they cut away for a commercial? Why was the audience laughing when they returned from that break? What did Robin Williams really say when the censor bleeped him?) Although the "Tonight Show" airs locally at 11:35 PM, the show is actually taped much earlier on the same day, usually from 5 PM to 6 PM, Tuesday through Friday on most weeks. Doors open at 4 PM. You'll want to pick up your tickets early (the office opens at 8 AM), and be in line at least an hour or two before the doors open at 4 PM. You never know who you might see on the "Tonight Show." Some of the biggest names in Hollywood have appeared with Carson and Leno over the years: superstar actors, renowned comics, even Presidential candidates.