went with a group of 10 on thursday night and the cast of glee showed up! fun times :)
the organizer for the evening forgot to make reservations - we were having dinner across the street and i frantically ran over to see about securing a table for 10 about an hour before we were planning to arrive. they were able to accommodate us at the couches around the corner by the door where you can't see the performance. (luckily we were able to score - ahem, steal - a table next to the stage eventually)
moral of the story - when going with a group, make reservations.