Yes, many hair salons offer beard grooming services.

Beard trimming services vary from salon to salon and from stylist to stylist. The length and the thickness of the beard also defines the cost of the service. 

You can shape your beard at home with a regular razor. But you will not be using any professional or quality results. Going to a salon is one of the best ways to get your beard properly shaped.

Your beard should be long enough for the stylist to be able to trim. A clean shaved safe cannot be trimmed for beard.

It is not necessary that one has to straighten the beard before trimming it.