At the risk of getting modded down further I'm going to post a few links. Either of my recommendations will require you to reduce your number of keys but it's definitely worth it. I use the leatherman hack myself with my car key, my house key and my office key and then keep everything else in my car. http://www.instructables.com/id/Swiss-Army-Keys-Key-and-Leatherman-Mod/ http://www.gmtplusnine.com/2007/08/13/japan-made-key-holder/ (Very nice key holder made by a pair of watch makers, you'll pay for it though)

I am pretty sure an implementation of the LF radio clock receiver would be a much more logical solution.

Whipping people in public is illegal, even in New York.