A lot of old-timey saloons would just put out a lunch buffet and as long as you bought one drink you could take what you like. Pretty good food by some accounts.
I talked to my Dad and he claimed this was still a thing in a few places as late as the early-80s, there were places with "happy hour" where they would put out a small buffet like once a week. He said in college he'd go to them and buy one beer and fill up.
Sharing food with others, one of the most common human group activities over the last couple of thousands of years?
No such thing as a free lunch