I’m not quite sure what the question is, but no, tickets aren’t held back- anyone wanting to go needs to call, buy online, or buy in person before the event, whatever it is, sells out. The only exception I know of is for those with a military id. They can buy tickets to Halloween and Christmas parties in person to sold out dates, regardless of whether it’s a military discounted date. I assume this is a friendly (and well-deserved) concession due to the sometimes unpredictable schedule of our military members.