Good Morning Mama's on 54th Street serves a good-sized Reuben. I'm told they make their own corned beef, too. The sammich is on delicious crusty rye and comes with a pickle. You can get fries, slaw or tater salad, but that's extra. Dee-lish and filling for $6.95, and for another $1.95 they'll bury the plate in big, straight fries that show every evidence of having been a whole potato quite recently.
I got there probably just shy of 2:00PM, and I'd say that the joint was probably 80% full, which is good to see. I was curious to see what kind of business they were doing for lunch; I knew that for breakfast on weekends they usually have a line out the door like they're giving dollar bills away.