My relaxation time takes a few different forms.
As I'm a very solitary person, just this side of a hermit, it tends not to involve other people. Stuff like "going bowling" or "hitting the pub" may well be fun and possibly insanely enjoyable, but my misanthropic ass would ordinarily not file it under relaxation. My ideal relaxation setting would be in the countryside, with a cat sleeping on top of me and a good book. That right there is my idea of the good life.
Another one is deep meditation, either sitting outside in the sun and listening to the world or sitting in a dark room with appropriate music. It feels so good to just let everything go and surrender to the flow.
Although, despite the hermit rhetoric above, spending the right moment with the right person can usher in such bliss. Sitting with your lover in perfect, peaceful silence is a peak experience.