All in the Family S03E07 - The Bunkers and the Swingers

Edith finds a magazine on the subway and reads an ad in the "swap" section. Not realizing what is actually being asked for, Edith assumes the couple is looking for friendship. Mike and Gloria, in a rush, try to explain what they really want. However, it isn't until the couple is actually standing in the Bunker's living room that Edith realizes, with a little help from Louise, that they are "swingers" and they want to swap with Archie and Edith.