WG7: Castle Greyhawk was a joke, and was terrible (bad adventure, insult to the Gygax and Greyhawk legacy, not even funny). EX1 & 2 are based on Alice in Wonderland and seem like they would be jokes but aren't really -- there are some very dangerous encounters in those modules! Likewise WG6: Isle of the Ape is based on King Kong, which would probably lead one to suspect it was a joke-module, but it's actually one of the biggest meat-grinders in the 1E canon. Not published by TSR (and not even technically a D&D module; it was published as part of the 'generic' Fantasy Master line) was The Abduction of Good King Despot which qualifies to an extent, in that the module's full of jokes and puns, but it's also full of very tough challenges and is, in fact, one of my very favorite 'old-school' modules (and also frequently mentioned by Gary Gygax as one of his favorites modules not written by him). Tegel Manor from Judges Guild is the same way -- full of jokes and puns, but not really a 'comedy' module as such. Rather just an artifact of an age when people didn't take the game as seriously as they came to later.