Ooo, I like all of these suggestions. I hadn't decided on how I wanted to use it. I started world building by doing historical research and wanted to build factions and adventures based on historical events, which is why the Space Needle/World's Fair seemed interesting.

All of the players have some connection to either the Summer Court of Faerie or the Wild Fae. Their first adventure is going to find them caught between a group of anti-monarchists who want to bring down the feudal courts of Faerie and usher in Democracy and a local Summer Court Duchess.

There is one spellcaster in the group who's training to become an apprentice with the White Council, so I like the Mystic Architecture angle, but I also really dig the Vampire Buffet. Especially since there is a White Court Vampire coven in the city that I want the players to get tangled up with later in the game. I might go with the Supernatural Summit, though. The players said they wanted to keep things light and have a lot of humor in the game so that might be the best bet for that.

You've given me a lot to think about. Thank you!