I'm not sure exactly what you're driving at, but for conferences like CppCon (and similar), the driving factor is usually technical interest and not just a way to waste time away from work (while drinking every night or whatever[1]).

So... could you explain what you're insinuating so I could respond to that instead of just guessing?

[1] Not sure about CppCon, but all "technical" conferences I've personally been to did have a lot of late-night drinking, but that was secondary to the technical stuff.