The official Le Club position is you will be granted points for two rooms in the circumstances you describe but only nights stay credit for one room.

However my experience is occasionally you might be granted nights stay credit for two rooms in addition to points for both rooms. There doesn't appear to be consistency on nights stay application when 2 rooms are booked.

I have also experienced points credit for only one room on occassion and had to ask Customer Service to manually correct.

Le Club T & C's on this:

"Expenses for Member accommodations and up to one other room at the same hotel on the same date (for a maximum of 2 invoiced rooms), provided the Member is staying in one of those rooms. Note that if the Member books two rooms, points are earned accordingly, but the number of Eligible nights is based only on the Member’s room."