Always tip cash to service people. http://tipthepizzaguy.com/
> Always tip cash to service people. It's more nuanced than that. Do you tip pest control, plumbers, locksmiths, that guy that fixes the spring in your garage opener? As a consumer, I'd rather pay a fixed price and not worry about carrying enough cash to supplement their income.
At any rate, yes, the tipping system is stupid, but you're not taking a bold stand against it by stiffing some poor chumps making less than minimum wage.