Dunkin' Donuts 282 Somerville Ave, Somerville, MA02143 Not only is this one of the larger Dunkin' Donuts in Somerville, this all-night hangout can satisfy your sweet tooth and…More coffee cravings 24/7. Street parking is hard to come by in busy Union Square, but visitors can pull right into the parking lot out front. Dunkin' Donuts is one of the most successful coffee and bake shop chains for good reason. With 52 types of donuts, an ever-evolving breakfast and snack menu and coffee served about a dozen different ways, they offer plenty of choices. It's a recipe that works on more than just this corner: since the first Dunkin Donuts opened in Quincy in 1950, they've added over 8,000 more locations worldwide.