Aired the Same Night as the First Episode of NBC's Saturday Night Live
Carol talking to the overweight group says, "Maybe next time you should meet at Soldiers Field". It's actually Soldier Field in Chicago. No s.
The same year, Cliff Osmond, who plays the brash member of "the fat group," is in a movie called Sharks' Treasure in which he's shirtless, tall more or less thin. It's most likely he was made to look more hefty for this episode.