My man cave is my detached garage in SoCal, where nobody puts there their they're cars in there their they're garages. Currently I just fill old 3 liter laundry detergent bottles and eventually quietly pour them over the fence on my neighbor's shrubs. I'm thinking about running a PVC pipe out into my lawn, terminating in a drain 18 inches below ground, and fashioning a urinal inside my man cave that drains into that. Mostly I use it when I'm on my Landice L8 treadmill, running 8x7:30 pace and drinking IPA at midnight. I know - my life is good. Don't envy - just judge.