How long is a piece of string?
Not all massage shops offer exactly the same service, nor do all girls offer the same types of service.
Generally what you can expect from a regular rub and tug is exactly that. You pay your $60/60min to the shop and normally tip $20-50 for a nude HJ depending on the shop and the girl.
It is best to research what shop you want to visit, do a search around the forum and get a feel for what other people have experienced and paid for at each venue.
Remember that massage shops are not brothels so don't expect FS. As to possibility of getting more than a tug, you may need to build up some rapport with a particular girl by being a frequent visitor and treating her nice. Some massage shops will offer FS on first visits too.
In summary, do some research around the forum and find out what shops and girls suit you.