Trade shows have an interesting type of culture.
You have all types of exhibitors trying to sell or promote their particular product in a enclosed area to people who don't mind paying up to $20 for the experience.
Shoppers sometimes find great deals at these events; although, it does seem to me some of the products can be found online for the same price or cheaper.
Regardless, trade shows are like the Renaissance festivals but with cleaner bathrooms. For an entrance fee, you get entertainment, information, and overpriced concession food.