My wife would beat me down if I got a kart for some fun racing! She knew how I drove in German on the autobahn.
If the pain is lacking so is the discipline...
"the only 911 call I need is chambering a round" - Mr. Muller, MO car dealer
I went to the indoor Kart track in Thousand Oaks CA one night with a buddy and some business contacts. We spent hours on th tracks and had too much fun. I'd go again in a heartbeat.