You’re not mom and you don’t have to drive the kids around. Your friends are adults and know how to navigate DC without a car. I haven’t found that my non-driving friends expect me to drive them around. I’ll offer if it’s super cold or something but by offering to drive all the time, you’re setting up the expectation that you’ll always drive them. If it were me, I would stop offering or start the hang out with “you’re good getting home without me, yes?” And then everyone knows what happening.

Or just drink a lot and tell them you can’t drive 😜