The Henry Mayo clinic IS having a VIP function tonight at SFMM. However, no one is sure if X will be open. Remember due to recent events, the ride hasnt had its media. I'd put my money on the fact that they made up the invitations and everything a while before they knew that X wouldnt be open yet.
So they prolly told you guys that it would be open, but no one will know until they get there for the party.