that is not always true, it depends on the place, most will say 18 but you need a credit card to hold the room. Hotels can be shady on renting a hotel room to an 18 year old, because they always think they are going to fuck up the place. Fucking up a hotel room seems like a good idea at the time, until they charge your credit card or send you a bill. My suggestion is to call a couple of places and find out how old you need to be.