I put a grill in my sim's personal inventory before he enrolled in University. He's in the 4-sim dorm at Foxbury and he is able to place the grill on the lot when he wants to cook. He also brought a firepit (from Outdoor Retreat) that he can use to roast marshmallows, hotdogs, and fish. That gives him a lot more choices for food. There are also some grills by the river in Foxbury that anyone could use.
Don't forget that your sims can go to other worlds. You can buy food from bars on many community lots, including the local bar in Britechester. There are foodstands in San Myshuno (CL) and Sulani (IL) that sell a wide variety of foods. There are seasonal food booths in most of the other worlds if you have Seasons. If you buy your sims the Always Welcome reward trait, they can also cook at other houses without anyone objecting.
