The first therapist I ever saw and I became friends after I quit. She was in the process of retiring. There was no talk of ethics or anything else. We met up once or twice a month to engage in a mutual hobby. I think we started the week after I ended therapy with her. There was no waiting period. It was fine and no big deal. A few times I met her with her family. We kept it up for about 10 years and then she moved across the country. We wrote for awhile and would see each other when she came back to my town. It was non-eventful and I don't think ethics or ethics boards were in the minds of either of us.