I'm talking about those episodes where they're all together in one room for the whole episode.

For me, it'd probably be "The One Where No One's Ready." It just seemed there was more emphasis on character interaction than actual plot that made the episode a lot more fun.

FYI, you can't say one of the Thanksgiving episodes. Those are a different breed. :p

"The One Where No One's Ready". I love how Chandler and Joey act like little kids while fighting over the chair...it's just so hilarious.