Have you ever wanted to collaborate with a coworker on something outside of your job, but can't ever find good time outside of work to schedule it? Our company

Have you ever wanted to collaborate with a coworker on something outside of your job, but can't ever find good time outside of work to schedule it? Our company did a hackathon (time limit of 24 hours, but no one stayed overnight) and I got to work with one of the senior tech leads on a HipChat bot. I found that extremely fun and rewarding.