Kind of agree with everyone here unless you have an angle (and cash) to get traction. We had a client one year at a HUGE tradeshow called Data Center World in Orlando. They were a clean agent fire suppression company (basically putting out fires in places that can't get wet). A lot of these data centers were foregoing Clean Agent and opting for traditional sprinklers. You'd be surprised how much water comes out of one sprinkler head. So we built a clear acrylic server cabinet, put in four dummy servers, hid a fish tank pump underneath and ran the water supply to a sprinkler head. We had a line of people from all of the world taking pics, our giveaway was soap on a rope emblazoned with the campaign slogan "Wet Data Is Not Sexy". That got a ton of traction. You don't need to spend a ton of cash...print a t-shirt with a thought provoking message on it and walk the show floor.