Access to crew seats for passengers
It was, and possibly still is, policy for certain mainland North-European scheduled and charter airlines to allow revenue passengers to occupy available cabin crew/cockpit jump seats, in the event of overbookings. This would have to be approved by the captain and/or the cabin crew chief, whichever was applicable, on the occasion. Both had the right of refusal, for which there was no comeback or negative opinion, in the event that they exercised same. These carriers carried insurance to cover this eventuality.