Unofficially yes, but only on Air France and KLM flights. If you've booked travel on other airlines then only the indicated baggage allowance will be observed by those other airlines.

However, I would advise caution here because as it is a completely undocumented benefit, there is no absolute guarantee that an extra luggage item will actually be granted, even by Air France and KLM. I would advise your passengers to confine themselves to one checked luggage item each; if, however, they genuinely need to check more than one item each, you should inform them that there is a chance that they will have to pay to check the extra item(s).

Unofficially yes, but only at Air France and KLM lounges where the scanner should beep green for each of their boarding passes. If you've booked travel on other airlines which would require using other Skyteam member lounges or third-party lounges at whichever airport(s) are involved in the itinerary, then no lounge access is granted because the passengers have no status and are not travelling in Business Class.

However, I would advise caution here because as it is a completely undocumented benefit, there is no absolute guarantee that lounge access will actually be granted by Air France and KLM. I would advise your passengers to try scanning themselves into the lounge but to also be prepared in case their eligibility to enter is called into question.