I have visited a few massage providers and the answer won't be the same for all. I think you can assume that anyone advertising erotic massage will include a "happy ending" but don't take anything else for granted.

Some offer full service for extra money. Some have both an escort profile and a massage profile, but prefer to keep appointments separate for a few reasons. If you are sure you want extras then, as suggested above, you definitely should discuss it in advance.

If you have not tried one of these massages I suggest you just go along and let the lady do her thing. The three that I have reviewed all gave fantastic experiences, that I found every bit as exciting and satisfying as full service, in a completely different way.