So it's not quite the same (by a lot!), but one of the things I did when I turned 21 was to go to one of those big Dave & Busters type amusement centers for the 21 and over crowd. A friend and I were bowling, and out of nowhere, these two drunk/high chicks come over, and one of them starts grinding all over me and then gives me a mini-lapdance. Later, we saw them in the center lobby dancing with each other and making out. That was a nice present.