In addition to the three big dining halls on campus (North Ave, West Village & Brittain), Dining Dollars can be used at all on-campus dining locations, including retail establishments and food trucks.
You can find the full list of current or soon-to-open on-campus dining locations on the Tech Dining homepage (scroll down to the "Dining Halls and Retail Dining Locations" section) or check out their hours here.
It's important to note that Bonus Dining Dollars cannot be used at food trucks or vending machines, and all Dining Dollars expire at the end of the year (end of the spring semester).