What's the name of your condo (if it has one)?
If it's Aranjuez, they frown upon "guests". You can definitely get away with it, but you have to be super discrete because there are families with little K*ds staying there, so the loud hookers in heels going and cumming at all hours of the night won't go over well.
My very first trip (started out as non-mongering) we made the same mistake, but we were a good 20-30 minutes from the gulch. About half the chicas we talked to wouldn't go that far and also had issues with it not being a hotel with security. A couple told me they never go anywhere except hotels.
But like MG said, there will be a line forming behind her if she declines. Don't worry about Spanish, most chicas know enough English to get by. You should learn some simple phrases and ESPECIALLY numbers.
This thread has a section about Spanish with some links to other threads:
https://costaricaticas.com/phpBB2/viewtopic.php?t=16357