I know which place you're talking about, actually! It is cool, but I don't think it'd be practical to move such a large amount of cosplayers outside.
(Edit: Whoops, totally didn't realize I was double posting... sorry.)
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- Mermaid Ariel- Swimmable (Disney's The Little Mermaid): 23% (Patterning!) Colossalcon 2015
- Magic Armor Link 2.0 (LoZ: Twilight Princess): 50% (Armor Revamp) Summer 2015
- Genderbend Makoto (Free! Eternal Summer): 27% (Wig Styling) Colossalcon 2015
- Emperor Lelouch (Code Geass): 2% (Planning) Summer 2015