Not ALL of them! That would be ridiculous!
This is the one I was at this time:
Starfury Presents - MISSION STARFURY: THE CYLON ATTACK - A convention for fans of BATTLESTAR GALACTICA and also FIREFLY and SERENITY
I had 6 holiday days left to use before the end of December and usually for cons I take off Friday and Monday because the event runs 6pm Friday to like 4am Sunday/Monday and then I need to get home. So this time I just booked off the rest of this whole week