Reach out if they are not advertising.
My general rules, be courteous, specific on amount of time that you are looking for and what time are you looking to get together. Don't discuss specifics or rates, your research should provide you that.
Supply a couple of past references of you have them. Normally their bio page or website will also let you know if they prefer text or email for initial contact. With all that it makes it easier for a single reply whether you can meet or not.
The Panhandle has a great selection of wonderful ladies ready to meet up!

Good luck.