Why isn't this in the high school forum? Does it matter? Off course it matters. Don't be a prik to anybody, specially to try to impress any chick. The act of changing yourself to seek someone's approval is so gay and unattractive.
Always be nice to servers and be nice to other guys, unless you want a big green booger to appear on your food order, or a fist on your throat. If you feel the need to be a prik to other guys, you really come across as insecure. She will see you as overcompensating for other short comings. If you are naturally ****y, you being nice to guys will help you, because she will realize that you are not a total dik to people. You don't treat men and women the same, for obvious reasons.
Always tease and be ****y/funny to girls, but be cool with guys, this says so much about you.