I find the best approach is to just tell the person, "Hey, it's been great talking to you (meeting you / catching up with you)! I'm going to go mingle a bit (say hi to some people)." That way you don't have to come up with some sneaky excuse (which will usually be obvious anyway). Instead of giving the impression that…

Or just get a Microsoft Surface...

See rule 12. That's the first thing that came to your mind. What other ways could someone be the opposite of Hercules? Instead of a weak girl, how about a weak man? Maybe the king Eurystheus, to whom he was enslaved. How about a strong woman, like Queen Hippolyta or Hera? Hercules was bisexual, so maybe his nemesis is…