Dude, go back to the vending machine and sit on the floor next to it with a BIG sign:
"
ANYONE SEEN A HOT CHICK WITH BEAUTIFUL EYES? GIVE ME HER NUMBER AND ILL GIVE YOU A SNACK MIX.
On the reverse, you can put:
"
GET TWO SNACK MIXES FOR THE PRICE OF ONE
Show the second side of the sign to draw people to the machine and then switch the sign around
