Feh....beginners!
There is such as thing as "Goof Off." I have a bottle under my sink. Takes off ANYTHING, including skin.
If you want to remove a club stamp off the back of your hand BEFORE it sets in like a damn tattoo, you IMMEDIATELY run to the bathroom after entering the club. Use hot water and soap and rub vigorously w/a wadded-up paper towel. That will take it off.
I'm 34 years old...and look it

. I hate those damn stamps (BTW, the muscle-heads at the door are usually UnDER 21.
) I wash the stamp off immedilately after entering the club, else it takes a week to wash off. I don't necessarily want the anal-retentive tight assed unhappily married people that I work for knowing I was at a bar or club. Wash that crap off right away!