Depends on the weather; time of year; any freelance work to get done; etc...
Right now in Winter? Usually just try to relax and spend some time with the wife. If we go out with friends, ok. If there is some freelance work to be done - ok. I'll usually clean the house before she get's home from work mid-day Saturday. One of the few days we cook dinner together.
Summer is different; bike rides, yard work, beach if it's hot enough, dinner / drinks out with friends, etc... I like to consider myself a intermediate to pro car detailer so I'll spend 4-6 hours on a weekend day detailing our 2 cars (1 suv, 1 convertible). That's relaxing to me - blast some music and wax, vacuum, multiple glazes, waxes, etc...
Or whatever. Concert, go down to the water front - usually anything but sit in front of a laptop...
Enjoy taking the family shopping, although I rarely buy much. I like the hustle and bustle and going for a coffee / meal etc.
During the summer I spend time taking photograph for my web site, half hobby half income generating but certainly my passion.
Now my kids are older and can be left I spend an hour or so at the gym, sometimes they come along and go swimming.
My wife works Saturday nights so I spend this time on whatever my current project happens to be.
Sunday nights my wife and I always watch a film together at home.
I leave weekends for whimsical ideas and intellectual chase the shiny-thing, it stimulates my creative side and gives me things to think about during the boring parts of the week
those are just off the top of my head...
I have real estate models, Energy Trading models, cryptocurrency models, mechanical failure predictive models, insurance models, sentiment models and clustering models
Everything is monetised
But it's also your secret so I won't ask more