If increasing your tips is on your mind, and you are male, make sure you do not draw a "smiley" face on the customer's cheques - as it is shown to decrease tips about 3%...since customers then think you're a ****** who needs to get killed.

Although, smiling will probably garner you a huge 50% increase in many instances. (Lynn, 1996)

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References:

Lynn, M. (1996), The Cornell Hotel and Restaurant Administration Quarterly.

I agree, the smile on the check makes me uncomfortable.

yeah but you gotta love it when the female ones do it!
kinda makes me feel.........special :)

Could be worst. He could have put his number.