A coffee would be a scream (literally because my LO has a good set of lungs)
Unfortunately a bit impractical - I can imagine the weary Dads arriving with their LO's screaming their heads off (either the Dads or the children). Having also missed their midday nap (both the children and Dads).
Joking aside, I would so welcome regular time to share with other blokes - with little ones in the background - just time to relax and chat without any purpose.
Last year I managed to meet up for a few months with another local Dad (who I discovered through a friend of a friend) - a couple of times a week until he moved to the other side of the country. They were really relaxing times. Just chatting about nothing in particular - but definitely doing it in a male way.