The food varies based on how much your company is willing to spend. The menu goes from as simple as hot dogs to lobster, steamship roast beef, etc.
My company goes cheap for the preseason, with most of the tickets given to employees. The food consists of hamburgs & hot dogs, a salad, maybe a platter of cold cuts. No hard liquor, only beer & wine.
The minimum order for our suite (about the smallest at Gillette, down near the lighthouse) is something like $2000 per game. Our hostess is always pissed off because the tipping stinks in our suite.
Looking thru the windows to the next suite and see the carving stations, fine linens, etc.
When the Cowboys new stadium opens our fearless leader will get rid of the Gillette suite (which costs @ $200k/yr) and get one in Dallas, for over $1M/yr (not counting the food, etc, of course)...