Is there any hotel in Miami that will allow an 18 year-old to book it with a credit card?

Prom is this Saturday, and my friends and are getting desperate. We only have one friend that can use a credit card, but we can only book it at a hotel that would allow 18 year-olds to do so, not just 21 year-olds. The only hotel that we know that allows us to book it is the Miccosukee, but my friends mom won't let her use her credit card there. Anywhere else works, just not there. An answer soon would be greatly appreciated, thanks.

Try Courtyard by Marriott at Miami Oceanfront

Forget it. If you owned a hotel, would YOU rent to a bunch of high school kids on prom night??