Bob Miller is a trade show and hospitality suite performer who features magic and memory in his act. On his site, you can find video of him recalling the names of 80 members of the audience, whom he only met a short time before.

As an aside, I've always thought that the best memory act to perform at a trade show would the memorization of the client's catalog, especially if it's 40 pages or more. You could entertain the audience with the memorization itself, recalling all the products on each page, along with their features and prices. Also, the company would have to love that, instead of simply working their sales message into your routine, your routine is their sales message!

Video Format:
QuickTime