How to pull off the quarters trick

Secret: The REAL secret to this trick? The real secret is to wait. Set everything up, tell everyone the rules, and... wait. Wait as long as it takes. If you've already done the match trick,, then you've captured everyone's attention... this is where you translate that momentum into a free drink. This trick IS SO unbustable, that you can let people work on it all night, until finally, in a fit of desperation, one of them will BEG you for the solution. Tell them that you'll be HAPPY to share the answer with them... but you're just... so... darn... thirsty!