The back of Al's tuxedo says "Farquhar's Formals." This is a reference to writer/producer Ralph Farquhar.
First, time in the show the kitchen/laundry room entrance is used in the show.
The name of the spa is Antoine - this could either reference Antoine, the manicurist to Peg, Marcy, and Jefferson in "Mr. Empty Pants", or a coincidence as Antoine is not actually seen.
This episode was taped on January 27, 1995.