I'm a new developer at a tech startup (I've been there a few months) and the time has come for the regular internal company hackathon. This is a 48hr window where developers work to build ostensibly "whatever they like" within the parameters of the business' needs. They are touted as a fun experience and great camaraderie.
I've decided however that I'd rather not go. For one thing, I don't see doing all-nighters and overtime as a perk, but more importantly in the past I've found that hackathons bring out all my worst qualities, which are exacerbated by high-stress, low-sleep environments. I don't really want to expound on what these are, but I take them fairly seriously and worry that if I attended, I might act in ways that damage my standing with my new colleagues.
But how do I bail out from a company hackathon without sounding like a wet blanket? These are team building exercises as much as anything else and I want to show that I'm a dependable and approachable member of that team. But they make me utterly miserable and I don't really want to be the person I become under stress.
What's a simple, honest, but firm way to state that I don't want to take part in this hackathon - even for the daytime? It is not mandatory but I think it would make small waves if someone appeared to boycott it.