We did this in February. We asked about adding CL access when we checked in and they were happy to do it. Once they charge you the $99 per day, then your MagicBands will work to open the doors to the 7th floor. You don’t get the extra bells and whistles, such as turn down service and chocolates on the pillow, but you do get access to the lounge. We really enjoyed it and plan to add the CL access when we return in August.