Mystery man on drinking glass

I got this drinking glass in a box lot at an auction, and have been trying to figure out who it is. I'm not sure how old the glass is, and there are no markings. Just trying to figure out who it is. I've asked around and had people say Tom Jones, Henry Winkler, and Jeff Barry. Haven't been able to find any definitive answer though, in terms of a similar image or the glass. Might just be a random 1970's guy I guess.

Figured I would see if anyone here recognized it. Any help would be appreciated, even just words I can use to search it. What is this type of drinking glass called?