You won't be able to do that. Will you already have club access for the first 3?
Yes, I'm using the e-cert for the club level upgrade on first 3 nights (the paid ones). I'm hoping they just let us stay for the last 2 nights of the 5, even though they're the 2 free nights from the credit card sign-up bonus. Wasn't sure if people have had that happen or not...