Yes, I have got one to tell. I went to a hackathon where they started the hackathon with a spiritual speech and prayer. They didn't provide any WiFi, food, etc.
There was a canteen in the campus, which got closed in the evening by 7 o clock. The timings were not announced before so we worked whole night with empty stomach. Did I mention one was not allow to go outside the campus during the hackathon? And yes one was not allowed to order food from outside.