Besides table tennis, what hobbies/sports do you do in your free time?

Impressive headphone amplifier setup. I have to ask, do these, “Go to eleven?” [Laugh inserted here]

Making money. I own an industrial controls company. We help automate things. However, I semi retired on 1 Jan 2021.
You guys wouldn't believe the stuff we have done.

When the pandemic hit I worked a little from home. I kill zergs when I get bored..
I play TT 3 times a week now because one of my practice partners, the best one, move to NYC of all things.
I play for the exercise now. This week I got out my chopping paddle just to play with something different. I am not a chopper but I can chop well in a practice situation.
I have a very good TT setup at work. There is lots of space but only an 11 foot ceiling. I bought a two boxes of Nittaku training balls, One is orange and the other white. A play can touch only his own color balls. The balls are cleaned with Lysol spray ant the table with Lysol wipes.

I have a truck camper. I go camping even in bad weather. The storm in Texas would have be a non-problem for me since my camper is an all weather camper.
I have actually needed to use the 6 wheel drive to get to some places. My truck is a 1 ton dually.

I have two bikes. One I call my retro cycle. It is a 3 speed with big tires. It has a hand brake for the front tire and a coaster brake for my rear tire. I like this bike much more than my Trek 24 speed because I don't have to fill the tires up before each time I use the bike.

I played chess in the past but I only had time to play in one tournament. I got a rating of 2057 my first time out.
Now I just watch chess videos on YouTube. I am interested in Leela chess 0.
I have Stockfish installed on my computers. My computer has 2560 cuda cores so it is a monster.
I use to write chess and Othello programs.

I am still trying to figure out what to do when retired when so much is restricted. Flying is a hassle and cruise ships are a no no. It is a piss poor time to be retired.