U of H (University of Houston) has a really good Hotel program, as they have a Hilton on campus that they use to train with!

I have a list of Universities here which are known as schools with good undergraduate business programs:
For Hotel Management, there is a listing of schools that offer programs:
I wasn’t able to narrow down a search specifically for marketing schools however, I’m sure the schools that offer good business programs will have good marketing programs as well.

In terms of your other question about Cornell’s Hotel Management, I think it is good that you have volunteer experience however it would also be even better if you were to volunteer in a hotel and have some experience therefore, they may admit you faster along with your marks.
Good luck with admissions. If you need any more help, send me an email. Thank you for answering my question, it was helpful.