Geezers are like fine wines. We ferment nicely after age 65. If you would like to literally ferment I suggest Osmosis Spa in Occidental. For 75 minutes you can bathe in a tub of finely ground cedar chips, rice bran and plant enzymes. As they heat up a warming chemical reaction is created. Mmmm. Osmosis is part of a Japanese style retreat in the lush, bosomy hills the near the Sonoma coast. Prices start at a remarkably reasonable $75/hour.
Photo courtesy of osmosis