excuse me for my english, hope u'll understand what i want to ask

i am going on a holiday trip this summer to bulgaria - goldbeach

dont know where most of you guys come from, so i'll explain i lil bit more.
it's a beach where generally many schoool classes (18-22year old) make sort of a last holidaytrip together. or other clubs like soccerclubs, cheerleader clubs, etc.

normally every group prints their own t-shirt, which probably looks something like this:


so i am going with my friend and we want to create a shirt too for ourselves, since it's fun and you probably get contacted by many girls on that shirt

so we are looking for some nice things to print on it, any indirect/direct pickup stuff, which could make a real benefit for us, some cool picture or text on it.

any ideas?