This seems like a fun idea to me. There are already a lot of beds in the village area. Also, the normal sleeping rules will apply (it doesn't let you sleep when a mob is near, you can only sleep at night, etc). But if you manage to sleep for 30 or 60 seconds without being interrupted by mobs, or another player killing you, then your health is healed up 2 hearts and full hunger. This doesn't allow tributes who didn't get food at the beginning of the game to sleep because they would have to sleep at night. And they will probably die before that comes.