Someone asked earlier about the real restaurant in New York where they shoot the exterior as "Monk's"---well, here's probably more info then you really wanted...
According to my New York City guidebook, it's at 2880 Broadway, at 114th St. near Columbia. Take the #1 or 9 Subway to 116th St. Greasy burgers for $3-5, dinner under $6.50. (And the big salad...??) It's open Mon-Wed 6 a.m.- 1:30 a.m. and from Thurs 6 a.m.- Sun 1:30 a.m.
The guidebook also said that that Suzanne Vega song from last year ("Doo, doo, doo, doo...") was written about this diner. ???
BTW, it's called Tom's Restaurant and the phone number is 864-6137.