I'm not exactly sure when or where this was, but it's still a cool picture of Frank Sinatra, Sammy Davis Jr. & Dean Martin. I'm not sure who that other guy is. Frank looks to be in a good mood. It looks like Sammy is saying something to Dino.
P.S. Don't forget to cast your vote in my poll to find out which cool cat is everybody's favorite member of the Rat Pack. The poll will close on late Tuesday of next week. I'll reveal the most popular Rat Packer among this blog's readers in that Wednesday's post.