"About two-seater benches
Technically "two-seater benches" are not chairs (BF_CHAIR).
I use BF_REFINERY as the new benches' functionality.

Because of this, your characters do not use those benches even if you turn the "Sitting when idle" AI on.
Characters can sit in the air and be pushed aside while sitting.
But I cannot fix those problems.

I can use BF_BED for the two-seater benches' functionality.
If so, characters do not sit in the air and cannot be pushed aside.
But characters often stack on one node because they tend to use their nearest node.
And I prefer not to see "Sleeping" displayed on PC's state and goal.

For these reasons, I decided BF_REFINERY is better for now."