Although she portrays Joyce DeWitt's mother in this episode, Paula Shaw is only 8 years older than Joyce DeWitt in real life.
Larry references a wild bar with a wet Tshirt contest called the Rusty Anchor. It must be the west coast branch of the Rusty Anchor that Dorothy and Blanche of the Golden Girls fight over for territorial dating rights several years later.
Janet could have just locked her bedroom door to keep her parents from seeing her & Jack sleeping in different beds.
Macon McCalman, who plays Janet's dad, plays Chrissy's boss in Season 3 Episode 16.