Originally Posted by
nacho
We'll be in the same situation too during x'mas. We filed 2 claims, 1 for Mr.Nacho and 1 for Mrs. Nacho, and both got approved. It's well within the T&C of BRG - 1 person per claim. I think what matters is that there shouldn't be the same name on both reservations.
I will definitely not tell them that I'll return the next day. Check out as usual and check back in again later in the day.
But you have to be careful. The next thing you know you are on their blocked list. Hotels are aware that this is happening. That's why they require,
Valid government issued ID is required upon check-in that matches the name found on the reservation. Employees of any IHG company or employees at any IHG hotel are not eligible for the Best Price Guarantee. 
Enjoy and have fun