Great Diner has Grandma on the Run!.
This is the quintessential diner, where, after a few visits, the waittresses will know your drink order and remember that you want sourdough toast with your omlette.
The food is consistently good (as long as you stay away from the "cheese sauce" :P) and they've recently updated thier menu to include more veggies and healthier options -- although, this is a diner and as such, butter is spread thick, cheese is piled high, and all the portions are BIG.
This is not the place to go if you're concerned about apearances (yours, or what your nieghbors would think); the clientelle is often tired, over-worked, unhealthy, or 'hung' and smokers reign.
All-in-all, the waitstaff is exceptional, the decor, 70's-anti-chic; and the food will make you yearn for grandma. Avoid dinners, but try anything on the breakfast & lunch menus; they are consistently satisfying and served all day.