So the company christmas party was booked at the Hard Rock Rocksino...

There was a ballot a few weeks ago. We could choose between a summer picnic, or a Christmas party. I voted for the Christmas party. One week later, we find out that the Christmas party won. Yesterday, I saw a post that said that the party was going to be at the Hard Rock Rocksino, which happens to be age restricted. Attendees must be 21 or over. Me, and several other employees, are under 21. How, exactly, does it make sense to host an event for all employees to celebrate at a place that prevents you from participating because of your age? I am at a major loss right now.