Sampson. I have not been to all of the places listed...but the general rule is ...if the girl is working, you can ask her to go with you to the hotel. She may say no....but is not going to slap you for asking.
The best way to find out is simple: ask for her telephone number. Almost all girls there have cell phones....or a home phone. If she gives you her number, it means she is available. Generally, at the Del Rey or Key Largo, you are not going to need to ask for a number....they ALL will go with you to the hotel...or someplace else if you pay them. However, I have had situations where I could not go with the girl at that moment, and asked for the number so I did not lose contact with her. Usually, she will give it to you.
At the following locations, I would never ask a girl to go to my hotel until AFTER I had sampled her at the establishment and decided I wanted her.
Bar Idem: I have had no problem meeting girls outside. Some may say no...but it is not an insult to ask. Alejandra was happy to meet me at my Hotel the next afternoon before she had to go to work again. I took her down Avenida Central to buy a new pair of jeans, then took her to the room where she repaid me ten fold. (There are rooms on premises which are like small bedrooms. They have showers down the hall)
Oasis. I still have Nicoles number, even though I have never called her. She is one hot mama. (They have nice rooms with massage tables. A little small but you would be amazed at what they can do. Showers down the hall).
New Fantasy: I have never asked a girl to go home with me there, but unless she has a K*D and has to go home after work, why wouldn't she. As long as you are paying...she'll go unless the K*D gets in the way. (Very nice rooms on premises like little bedrooms. Showers and sauna/steam rooms down the hall)
Zona Blue: My favorite MP. On my last trip I really wanted to see Valeria, but she would not give me her cell phone or agree to see me. She finally admitted she had a 38 year old jealous novio who might stab us both if he found us together. I stopped asking! Later I learned she had to quit the massage parlor, so I assume he found out about her job. (Very nice rooms with beds, and showers in the room which is nice. Sauna/steam down the hall. Nice lounge area where you can sit with your girl)
Strip Clubs....I am not into these....so am a bad person to ask, but normally they work till the wee hours of the morning, so taking them to the hotel may be too late. I assume you could bar fine them, but I do not know for sure. (Most of them have small rooms available. The best is Casablanca which has really nice rooms right off the strip stage)
good luck