If you're a performer then there should be no reason you shouldn't have at least one thing on you at all times. Whether it could be something you perform with your IPhone (Mental Killer, a routine that utilizes IForce) or something in your wallet, an index card or business card that you can split in along with your credit card or even under your license.
A silver dollar in your little "useless" jean pocket that lies above your right pocket.
Ring of truth by Banachek and Patrick Redford's Prevaricator are WORTH learning.
I was on a double date yesterday, my girlfriend and I and another couple who we've had a class with separately in College with. The guy heard I did magic and was very interested and I was ready to go no problem, no setup.
Again, if you bring your wallet with you everyday, which you should in order to drive because your license is in there, there should be no reason why there is not something in your wallet.
I never go anywhere without my phone so I'm reading to fit it into one of my routines.
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My three favorites to perform
1. Kolintrol or Forced Will
2. Billet work
3. Ring of truth or Prevaricator
When I do impromptu performances it's usually Mentalism. I'm careful and have my justification plans way ahead of time. I don't claim to read minds I claim to use psychology and intuition.
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If I go the magic route and have cards on me, usually always in my back pocket..I really need a porper clip, I usually go to these routines
1. My ACR routine
2. Third Degree by Lee Smith
3. High Five by Paul Vigil (Thanks Paul)