Two sides of the parking lot, two kinds of eating
The hotel and the casino feed you differently. TownePlace is built around your own kitchen, a free breakfast and a small bar. Shorelines has a sit-down restaurant and lounge and a buffet, both inside the 19+ casino. Several chain restaurants on Bell Boulevard fill the gap.
Inside the casino (19+)
Windward Restaurant & Lounge. Great Canadian describes it as "an excellent selection of modern casual fare" with a "fully licensed bar". It is marked "Must be 19+", and the operator's rewards credits are accepted there, if you have a card. At the 2017 opening the Windward Lounge doubled as a live performance space for local music and comedy. We could not find a current entertainment calendar.
The buffet. A buffet is listed among Belleville's amenities on the operator's casinos page. Hours and menu were not readable on the pages we checked, so ask at the casino.
At the hotel
Breakfast, included. Marriott lists a free breakfast for hotel guests, served Monday to Friday from 6:30 to 9:30 AM and on Saturday and Sunday from 7:00 to 10:00 AM. The gallery shows a breakfast room with a long community table and a buffet counter.
Townies Bar. Open every day, 11 AM to 10 PM, casual dress code. It is a hotel bar for a drink after the drive, not a destination.
Your own kitchen. Every suite has a full kitchen, and the gallery shows a market corner and a coffee station in the lobby. The hotel offers no room service, as its own FAQ says.

Within walking distance (the hotel's own list)
| Restaurant | Distance (hotel's list) | Meals |
|---|---|---|
| Boston Pizza | 0.2 km | lunch and dinner |
| Montana's Cookhouse | 0.2 km | lunch and dinner |
| Linguines | 0.5 km | lunch and dinner |
| IHOP | 1.0 km | breakfast, lunch and dinner |
| Panera Bread | 2.0 km | breakfast, lunch and dinner |
Worth the drive
Downtown Belleville is eight minutes away by car (Google Maps, 5 km to city hall). Belleville sits where the Moira River meets the Bay of Quinte, and an evening walk there is a better end to the day than a parking lot. Picton, in Prince Edward County, is 33 minutes away. The hotel's attractions list starts with the County wine route, and its things-to-do list names several wineries offering tours. If anyone is drinking, decide on the driver first, or take a taxi.