CrossFit, running club, November project, hiking club, board game clubs, DND clubs, Meetup.com events. Coed sports leagues like: disc golf, infinite Frisbee, soccer.

There’s also things like live figure drawing, music jam clubs, acting in local plays.

https://www.usatoday.com/story/news/health/2020/02/03/tap-water-chlorine-may-have-cancer-link-johns-hopkins-study/2854631001/

Seems like it increases cancer risk, but it’s the cheapest way we have to sanitize water so

https://www.cancercenter.com/community/blog/2020/05/drinking-water-cancer-risk

I’m putting the water in glass containers, so no need to worry about it leeching materials. Also, I am positive I get all the micronutrients (the paper your cited refers to magnesium and iron) I need from vegetables, without needing to resort to tap water that contains high levels of microplastics. I also brush my teeth with floride, so no need to worry about dental caries.

Bidet attachment for a toilet. You can get them cheap, or spend a bit more for heated seats, warmed water, fans for drying, etc. Best bathroom decision ever.

Countertop electric water distiller. For a reasonable price you can get a countertop water distiller that runs a gallon for like $0.15. No more microplastics, chlorine, ammonia, lead, or facial matter in your drinking water! Tastes SO GOOD, nothing like the plastic filled distilled water from the store, blech. Every time we make a batch, we’ll smell the sticky residue left in the heating chamber and gag. It is nasty stuff. In our tap water, gross. Clean water for me please! Makes our coffee, tea, and kumbucha taste a lot better too.

Getting into a healthy BMI and daily exercise is pretty epic too. You’ll just feel better every day.

As climate change gets worse, having resilience like stored food and water will be helpful to deal with more frequent natural disasters. No sense bothering with fancy meal packets, a couple dozen big cans of dried beans will go a long way if there’s a shelter in place order.