This idea comes from the number guessing ESP trick and used on a 3 set of women.

I guess for preparation you will need a pen and napkin.

Approach the 3 set and say "Sorry, only going to take a minute or so with you, me and my friend were debating how perseptive women are to ESP, can I test somthing on you guys?"

Write on the napkin 37 and fold it up and give it to the FB in the SET saying "put that somewhere safe where i cant get my hands on it" (with a smile and look out for IOI's like putting it down her top)

Ask girl 1 to pick an uneven number between 1-4

Ask girl 2 to pick an uneven number betweek 1-10

Ask FB to pick an uneven number between 10 - 50

Ask FB to take out the napkin but not open, then ask girl 1 for her number (should be 3) and girl 2 (should be 7), then ask the FB her number (should be 37) then reveal the napkin.

I have tried this on a few friends and 90% get at least one number right with the other one or two digits out but hey if goes totally wrong then just tell them that you mate is right and go into another opener or ask what they are all doing out that night.

try it out and debrief us with the results please!!