The 12th Avenue Cafe' has the look and feel of a diner, and overall the food is pretty good. They're open for breakfast, which didn't look fancy, but it covers all the good stuff. However, we arrived later for lunch; and though we were immediately offered coffee (good sign!), we were planning on a different meal.
The lunch menu has burgers, sandwiches and the like. Nothing fancy, and while they do have salads, you're not coming here for healthy eating. With four of us in our party, we got a good variety of lunch items. Most of it was pretty good -- the garden salad was excellent, as were the sandwiches and soup we ordered. During out visit, we had a choice of French Onion Soup and Clam Chowder -- both are quite good. On the other hand, the fried halibut wasn't fresh and wasn't all that. It's a fairly thin filet, so you mostly taste the fried and not the fish. I'd stay away. When you order a sandwich or burger, you get a nice choice of sides including soup, salad, fries, spuds, etc. It's somewhat pricey for diner food, but the portions are excellent and the area is relatively expensive anyway. In 2013, the basic sandwich menu is $10.45, side included.
Overall, we were happy with our experience. Not sure that's what we wanted when we arrived, but decided to stick around and (except for the halibut) were happy to have eaten there.