Jack Williamson (of course!)
Quick quiz: what do they have in common?
They are all SFWA Grand Masters, and you rarely find four of those in any one place, unless you frequent a certain Dairy Queen in southern New Mexico. You may think I'm kidding, but I'm not. Sadly, Jack has passed on and the Dairy Queen went out of business, but it's still my favorite event of the calendar.
Head over to The Black Gate to hear all about it from the organizer, Professor Patrice Caldwell.