You could come up with a theme and make a nice sign like “Do YOU Farkle?” or “Farkle, Farkle, Farkle” and make it a little Vegas-like stand with a playing surface and white board for high scores on 3 throws of dice. You could even find some huge gag dice so they are more visible (like the 8″ dice half-way down the page on http://www.presentationresources.net/dice.html ). The decoration, sign and high rollers list would be the kicker.

It’s not as physically active as the bag toss, though. There are also magnetic or velcro darts. Or make your own game with a big pair of dice like at http://www.enasco.com/product/SB41719CQ .
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Sometimes the best idea is one you know works.
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Do trade shows also