Yes but the girl needs to show ID. You can also have girls meet you at your room when they show up at the front desk they call and ask if it is ok to send her to your room. They hold her ID and when she leaves the desk calls you to make sure everything is ok.
I have stayed here many times and always enjoyed!!!
Areca Lodge if you want to be close to LKMetro, Best Beach Villa if you want to be close to Soi 6. I stayed at both, although next time I go I am going to try to get one that is a little closer to the mid point between 6 and LK I think... maybe...