Ann is the astrological sign, Scorpio, as is Marlo Thomas herself. Don is a Libra, but Ted is a Pisces.
Donald says that his birth date is September 26, which makes him a Libra.
The Gomer Pyle, USMC, season 5 episode called 'Win-A-Date' also has a Dating Game theme. Both sets look the same as well. The emcees are different actors, though.
Donald mentions his birth date is October 6. Which the the date that the actor who plays him died.