If people-watching isn't what you had in mind, and you've already hit the Alley/Dealer's/Games room and done what you want there, play a game!
My con buddies always bring a deck of cards or two, and we've often made new friends by having others jump into the game!
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- Judal (Magi: Labyrinth of Magic): 16% (Wig Overhaul) Katsucon 2017
- Galaxy Print Shiro (Voltron, Original Design): 70% (Arm Work) Katsucon 2017
- Blanche (Pokemon GO): 82% (Sewing) Katsucon 2017
- Lelouch [Emperor Robes] (Code Geass) : 4% (Patterning) 2017