I am going to say raymond Burr on the left. I could be wrong, as many actors had that same look, in the day, but definitely not Tony Curtis. Tony was much thinner in the day, and this guy has a bit more of a gut.
Somebody else on Facebook mentioned it as Tony Curtis and Rock Hudson as well.
Meredy's Rock Hudson Trivia Mania (Last photo at the bottom)
I found that exact photo matching Rock Hudson. Still can't find that other photo to confirm whether it is Tony Curtis or Raymond Burr.
Okay the eyebrows push me a little toward Curtis, but it's Burr. That jacket is hiding some girth. And Tony was a skinny guy in his early years, whereas Burr was always larger.