In an earlier stage of my career path, I worked for a few hotels. So long as you do not disturb other guests, they could not care less. Being nervous is fine, but you need to have a backbone. That is why the go-to move of any rip off SP is to make a scene, so you will just turtle and let her walk with your money. Call reputable agencies and ladies only. NEVER call a LL girl with no reviews and no track record, they are the ones that will take your money and bail.
Now if you have had 3 visitors already that night, you can expect a call from the front desk telling you to STFU and go to bed. They have every right to limit visitors after 11 or so.