THC is a large, casual beer garden that serves a variety of drinks and snacks (often food trucks) - it's a great place to meet for a large group, and it's near the venue/hotels. A 21+ curfew is only enforced after 9pm.
Our town's beach for a stroll or dip in the water (and probably fireworks!) -- check out Walnut Beach Creamery on the boardwalk for some great ice cream.
The best restaurant for New Haven style pizza, in our opinion :-)
Casual, classic New Haven style pizza
If you're from the Northeast, you've probably seen Two Roads beer on tap at most bars -- their brewery/tasting room/beer garden is in Stratford, CT, about a 20min drive from the venue/hotels.
Excellent American restaurant down the street from the hotels
The PEZ factory!