Do you have a roll away bed? We are coming to Arlington in Aug to bury my husband, and my son is not wanting to share bed with mom, and he is far to tall/big to be on a double bed,
Sorry that you have to come to D.C. For this sad reason. The hotel has rooms with two double beds. That's probably your best bet. I stayed with my two small kids in a room like this.
Get an answer from Washington Plaza Hotel staff and past guests.