R.I. Gen. Laws § 5-14-5.1: Refusal of admission.

An innkeeper may refuse to admit or refuse service or accommodations to a person who:

(1) While on the premises of the hotel, acts in an obviously intoxicated manner, destroys or threatens to destroy hotel property, or causes or threatens to cause a public disturbance.

(2) The innkeeper has direct knowledge a person is seeking accommodations for the unlawful possession or use of controlled substances in violation of chapter 28 of title 21 or the use of the premises for the consumption of intoxicating liquor by a person.

(3) A person under the age of eighteen (18) years who is not accompanied by an adult.