Amy Baer, the taller of the two girls who make fun of Fonzie (Henry Winkler) at the skating rink, is the daughter of Tom Bosley, who plays Howard. She is listed as Amy Bosley in the credits. The other two kids, Scotti and Kathi Marshall, are the children of creator Garry Marshall.
The signs on the wall at the skating rink say, "No Street Skates Allowed", "No Chewing Gum, Please", "Tango Contest Every Tues. Night. Sign Up Now!", "Skate At Own Risk", "Muggy Magoo Teaches Skating",