I don't understand how people go to this much effort for "gender reveals". I'm even more perplexed anyone would give a shit enough to attend. Just stay home and flip a coin, toot a party horn regardless of the outcome, and you can do it again immediately if the surprise was a rush.

My guess is people feel like they have to go out of common courtesy, but even then, free alcohol was the only thing that scraped it over the line.