re: What are good hobbies for mid-20s to mid-30s men to pick up?

I've played golf for decades. Belong to a couple of groups and we play in a league traveling to local courses or spending weekends further away. Points system prevents "sandbagging".

I shoot skeet/trap and sporting clays.

One of my most enjoyable "hobbies" that I picked up watching youtube vids, was small engine repair. Lawnmowers, blowers, chain saws, weed eaters...Repaired dozens for myself and friends. Only failure was a Poulon chainsaw.