I'm not sure about hosting the gathering, but depending on the date/time if no one wants to, I'll be glad to pitch in and help make it happen. I'll be cosplaying an Angel Variant of Petra Ral as well as her canon uniform version on another day at ALA.
Anime Expo (Saturday)
Anime LA 2016 (All 3 Days)
Petra Ral// Attack on Titan: Wings of Counterattack (Struggle at Dawn)
Black Widow // Avengers: Age of Ultron
Enchantress // Thor (Comics)
Ada Wong // Resident Evil 2 & 6