<human>: Can you give me a shortened version of the text?

Back in high school I participated in a fairly large youth group. Each city had 4+ chapters and this particular convention was a regional one with 3 different cities - so the total number of high schoolers at the convention was above 200.

They had these conventions in hotels, with little to no adult supervision. Most conventions, the hotels put all of the teenagers on their own floor, to try and avoid complaints from the "actual" hotel guests. For some reason, this hotel thought it would be an okay idea to put convention kids on a floor with actual residents without informing the staff at the convention.
In the morning, the high schoolers in charge of planning the convention got the luxury of waking everyone up in the morning at 7am. How do high schoolers with little supervision wake up an entire floor of teenagers? 

Sirens. Yes, they took air horns and went running through the halls, pounding on all the doors and blasting the horn. Needless to say, the hotel got so many complaints that the convention was nearly cancelled. They settled on never being invited back as a proper punishment.
<bot>: Youth group convention planners woke up random hotel strangers with a blow horn and sirens at 7am.  Almost cancelled the entire convention.  Never allowed back.