I told the owner that his BH should or can be with more nests if the BH configuration allows lesser light into the nesting room.
His external sound system was downed and there was no proper tweeters on the top entrance areas.
The number of internal sound tweeters were okay and well located.
He should have installed more fake nests since nearly 45-50% of the fake nests installed were with tenants.
What I came out with was how to minimize those light entering the nesting rooms.
First he need to reduce the size of the connecting door between the roving area and the nesting room.
He should also apply some black paint on a few walls.
As for the nesting rooms he should have install two partitions and create VIP rooms at the ends of the room.
One at the front and the other at the back.
Their doors must be facing each other in a straight line.
It should look something like this: