I am hoping to locate a restaurant that serves the Korean wine makkoli. I'm willing to travel!
They don't necessarily list it on the menu. Ask for it. Unless you go to a place like Cho Dan Gol (where the makkoli always seems to taste better, but I don't know if they make it or buy it), you're probably better off buying a bottle at a market or liquor store. Any liquor store in a Korean neighborhood should have it. I've purchased it in Woodside, at the liquor store next to H-Mart. I'm sure that Union St. in Flushing is inundated with it.
60-06 Woodside Ave, Queens, NY 11377