I have searched high and low for the answer to this question and cannot find it. I have two separate Club Carlson accounts. One is linked to my personal Visa and the other to my business Visa. I would like to book two rooms for two nights at Radisson Martinique in NYC. I would use one CC account to book two nights for my friends and get the 2nd night free. And then I would use my other account to book a room for myself for two nights and get the 2nd night free. Is this possible? I seem to remember reading somewhere a while back that in order to get the 2nd night free I need to stay in the room myself. Or do I just have to be present for check in?