Michele McDonald for the Boston Globe

A s'mores shake at the Burger Dive in Somerville.

Michele McDonald for the Boston Globe

An order of fried pickles.

Michele McDonald for the Boston Globe

A cheeseburger classic comes with lettuce, tomato, onions, pickles, and dive sauce.

Michele McDonald for the Boston Globe

Glenn Pacheco, left, and Bill Philbrook, both of Somerville, ate at a table with a burger car parked outside the window.