The colorful wall mounted rotary dial phone Carlos uses was state of the art equipment at the time of this series.
Arlene Golonka, who played Dottie, went on to play Millie Swanson on the TV series "Mayberry RFD" the next year.
The music playing in the Carlos A Go Go discotheque, following the opening credits, is an instrumental version of "Auntie Grizelda," made famous by The Monkees. The song was written by Diane Hildebrand, and is performed by an unidentified group.