"Single male would like to go for dinner with a couple m/f or even 2 couples and after see where goes I can accommodate, and dinner its on me "
What if they only want the food?
Isn’t that classed as a social to see if you want to take things further? My boyfriend and I always do a social first to determine if want to play. We’d arrange a meet with all parties understanding there’s no expectation to play and also all go Dutch if drinks or food is consumed on the meeting.