L.A.
If they ask you to model for them, they should either pay you or allow you to also use their shots.
Or at least give you a set of the shots.
Professionals are always paid. People that just have shots made for fun, are not professionals. They are just having some fun..
My husband is a professional Photographer and he always pays the models or comes to an agreement about the use of the photos with the model, like trade. He allows them to use the photos or gives them a set.