Are you a "Swiper"? How do you tip the valet?

I wonder how many people who rely on tips as their main source of income are affected by the fact that hardly anyone carries cash with them any more.

I was pulling up to valet my car the other day at The Intercontinental Hotel - our favorite evening spot - and realized that I didn't have a tip for the valet. I simply don't have much use for cash any more. I swipe my card for pretty much everything that I buy.

I am usually a big tipper, but sometimes I don't have time to find an ATM machine and get cash for tips.

Lame blog topic I know - I just thought that it was something interesting to think about.