What does it mean when a Japanese geisha privately gives a man a rice cake?

@Si1234 (457)
October 7, 2006 7:40am CST
was watching the movie Memoirs of a Geisha and I didn't understand what it meant when she was giving men a rice cake and then that lady was telling her something whoever is the higgest bidder, so can someone just explain this to me. Thanks!
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