Is it PotG?
Thrifty non-licker
More likely to sing as one as the extra seats could be a designated singing section, so the signing groups could move together. It’s a win win.
So if you find yourself seated on the border of 2 such groups, which song do you join in with?
Are you allowed to sing outside of these designated areas?
What happens if you have a sore throat whilst in this region, and are unable to join in? Are you moved along?