haterobics said: "Not sure how it works, but he also has people watch him do monologue jokes earlier in the day, to help thin the herd, if you can't get in for the whole show.
Reserved tickets for the monologue as well as the main show itself are distributed through 1Iota.com. They usually open up sign-ups on the 4th or 5th of the month for shows the next month and they're usually gone very quickly, so anything for September was gone weeks ago... As discussed, they have a day of the show standby line for the main show but I don't think they bother with standby for the monolgue though you can certainly ask. 1Iota has a virtual monopoly on ticket distribution for the late night talk shows as well as some morning and afternoon shows. Other companies handle audiences for the sitcoms in L.A.