Some says Beal’s is among the best lobster shacks in Maine, and it’s certainly got the right atmosphere: Creaky picnic tables sit on a plain concrete pier overlooking a working-class harbor, right next to a Coast Guard base. (Don’t wear a jacket and tie.) You go inside to pick out lobster from a tank, pay by the pound, choose some side dishes (corn on the cob, slaw, steamed clams), then pop coins into a soda machine outside while you wait for your number to be called. The food will arrive on Styrofoam and paper plates, as it should. There’s also a takeout window across the deck serving fries, fried clams, and fried fish (sensing a theme?), plus ice cream.