Is there a refrigerator in the room?

Yes, or you can request

Most rooms have refrigerator but I would ask they are small dorm room types call to make sure staff is great at Marriott in Charleston

If not, they will bring you one and a microwave.

Yes there is

Yes

Well, yes and no. When I was at the Charleston Town Center Marriott, the room we had didn't have a fridge or a microwave, but a friend of mine had a fridge and a microwave in his room.

Yes, most rooms have a mini fridge

Yes. In most rooms I believe.