Alas I have never attended any game events.
The wife last year went with our son to a Starcraft based event in Toronto. Not my thing to pay top dollar just to watch other people game for 3 days in crowded conditions

But I also won't pay to watch sports either.
It looks like they are going to a second one this year.
Me, the ONLY events I have ever attended with 3 events of AnimeNorth in Toronto, but it was an event of multiple interests ie manga, anime, purchasing, watching, cosplay as well as just a sort of 3 day holiday. I went to two with son back when he was still a young teen. I'm hoping to go next year for the first time in a few years.
I recall one instance mentioned on forums, where an ASL event was at a location the same day another event was playing. It was a funny contrast. Either 100 overweight old men pushing counters or something akin to a Victoria's Secret event. I couldn't picture choosing the old men

Most of what I know of non wargaming though, is by being a witness not a participant. And having several intensely active gamer friends who are also younger males and single as well, tends to give me plenty enough exposure. That and having a typical gamer teenager in my home. So much of gaming is something I know of, but have never actually really experienced directly for much. Not sure why I bought GW2 for instance. Looks great, but I feel like a fish out of water playing it. Just can't wrap my head around the practice of playing an MMO for hours every single day.
I am definitely what they call a 'casual' gamer when it isn't something about WW2 and a boring looking board gamish style wargame.