Under the Washington residential eviction moratorium hotel/motel guests who stay at least fourteen days may not be evicted (with some general exceptions applicable to all tenants). The Washington eviction moratorium ends June 30.
Under a new law now in effect, a hotel or motel may serve a guest who has stayed for thirty days or more with a seven-day eviction notice. After the seven-day period the guest is not a tenant for the purposes of the Residential Landlord-Tenant Act.
The law is silent as to whether the tenant must be removed under the unlawful detainer statute (essentially a non-residential eviction). Also unclear is what legal steps are required to remove a guest of less than thirty days if law enforcement declines to assist in their removal.
As this is a new law and untested in the courts, it is best to contact an attorney if you have a hotel or motel guest who refuses to vacate.