What are your favorite places or events which encourage costuming?
I do a lot of larping (Live Action Roleplaying), in large part because I adore the chance to get dressed up and the creative challenge of coming up with an awesome costume (my current character is a blend of Italian Renaissance and Classical Greek styles, who favors purple and silver as her colors).
I occasionally attend Renaissance Faires, as well, which are great for Elizabethan costuming.
There's also the Labyrinth of Jareth, which I'm hoping to be able to attend this year.
Any other good places to show off what we've made?