problems with finding partners at an event dedicated to X: if you're interested in X independently of it being good to find partners there, the gender(/sex) ratio is (if you're heterosexual) likely not in your favour (unless you're odd, but few people are odd). furthermore, if you *do* ask someone out, you might get rejected & perceived (and gain a reputation as) creepy, or mistakenly (“mistakenly”) identified as a sex pest
when do you learn it?) if they do agree, you have another mess: others might still get jealous and call you a pest, with the standard hansonian dynamics voluminousifying, or leading to sliding into social bullshit; or there might be a less than optimal breakup that leads to one party not wanting to do X anymore. (not success). (this is furthermore worsened by the fact that you are probably not calibrated & smooth and can handle rejection well, or the other person can't handle rejecting well.
oh well). so. if you go to an event about X because the gender ratio is good and you don't really care about X, then it is probably immediately and super clear that you are being *very* incongruous, and it's, like, not a great move? it feels very much like not a great move. so, this is the tree of badness for asking people at hobby events.