As far as I am concerned, Summer Bartholomew was the Hostess, not a model on the show. The models were three gals and two guys. I do remember David as one of the guys, yet I don't recall the other guy. Per other threads here, we do know two of the female models, Lou Melford and Elaine Hobson (Elaine was the African-American model with that energizing smile). The third one, the blonde member was named Linda, but her last name is not known.
By the way, per another thread, I belived Lou was on the Learning Channel hosting something. Was this true and is she still doing things for the Learning Channel? Just curious.
In terms of Summer, she was more like a Karen Marie Thomas (1,000,000 Chance of a Lifetime), a Vanna White (WOF), or even Stacy Hayes (Lingo), which is being a hostess who had more of a speaking part on the show.