Directions: Its a pretty small place and the bathrooms are in the back. Follow the path through the tables and the counter to the back. Turn to your left or you'll walk. Door is on the left. Unmarked but usually left standing open. There's only one way so you can't go wrong! Everyone is friendly so if you're unsure, just ask a customer or staff member and they'll direct you. Its also very busy and super popular so there is almost always a crowd at the front door. Just make y our way through. Usually everyone moves for you anyways. Definitely NOT accessible.
Comments: http://www.johnslunch.com/ People come from all over to have fish or clams and chips at John's. If you have the time take 1/2 hour to have a great lunch for pretty cheap.