The only show I really go to is Southern Fried Gaming Expo. I don't think the OP would like that one very much, even though it's an amazing event.
SFGE brings together arcade people, pinball people, board game people, console people, and many more. I love going even just for the social aspect. I've met some very cool board game people I would never meet otherwise.
Since it's held in Atlanta, there's a LOT of the public that comes. It makes Saturday busy but I love seeing so many people having a good time and families sharing these things with each other. Being able to introduce people to these things that I am so passionate about is a great thing!
SFGE even has amateur wrestling, a hot pepper eating contest, movie screenings, contests galore, dozens upon dozens of seminars, plus a lot more. It's not a "pinball show", it's a gathering of all people interested in gaming of any kind. They have a console room with every console ever made and a slew of games to play.
This year they have almost 100,000 sq ft of space. If any of you come, I'll play any game you want with you. We all win when these shows win.
PS - I'm not affiliated with the event, I just love it. The people behind it are quality people that are in it for the love, not the money.