How old must you be to stay in a hotel?

Travel Info
Im 17, and i want to stay in a hotel in boston, Mass. I have permission from my parents to go, but im going alone. Any help?

Travel Tips

passport and credit card, if you have both you'll be fine, you cant drink alcohol though
Others

it vaires from country to country, ask em first prehaps?
you need to be 18.
without a parent I believe you have to be 18.
i think older than 18 by yourself or you have to have id
you have to be 18 with an I.D
Most importantly, you need a credit card. Most places won't take you unless you're 18, and some won't unless you're 21. Have your parents make a reservation first, and then bring their credit card and you shouldn't have a problem.