7 , 5 0 0 ▁per ▁day ▁continued ▁into ▁ 2 0 1 2 ▁and ▁the ▁convention ▁was ▁a ▁sell out . ▁The ▁convention ▁added ▁the ▁Hil ton ▁Garden ▁Inn ▁D TC ▁hotel ▁in ▁ 2 0 1 3 , ▁occurred ▁during ▁the ▁ 2 0 1 3 ▁Colorado ▁flo ods , ▁and ▁attend ance ▁remained ▁c apped ▁at ▁ 7 , 5 0 0 ▁at ten de es . ▁Al ong ▁with ▁the ▁flo oding ▁the ▁fire ▁alarm ▁went ▁off , ▁torn ado ▁warnings ▁occurred , ▁long ▁lines ▁occurred , ▁and ▁the ▁mas qu erade ▁had ▁to ▁be ▁stopped ▁due ▁to ▁a ▁medical ▁emer gency . ▁The ▁convention ▁also ▁hosted ▁the ▁World ▁Cos play ▁Sum mit ▁Mountain ▁Qual ifiers ▁with ▁Green ▁J ello ▁Cos play ▁winning . ▁ ▁Nan ▁Des u ▁Kan ▁moved ▁from ▁the ▁Mar ri ott ▁Den ver ▁Te ch ▁Center ▁to ▁Sher aton ▁Den ver ▁Dow nt own ▁Hotel ▁in ▁ 2 0 1 5 ▁due ▁to ▁growth ▁and ▁included ▁an ▁expanded ▁deal ers ▁room . ▁ ▁Event ▁history ▁ ▁Other ▁Events ▁On ▁August ▁ 8 , ▁ 2 0 0 4 ▁the ▁convention ▁held ▁a ▁Cos Play ▁Dance ▁Party ▁at ▁the ▁Rock ▁Island ▁Night ▁Club ▁in ▁Den ver , ▁Colorado . ▁In ▁ 2 0 1 1 , ▁Nan ▁Des u ▁Kan ▁organized ▁a ▁benefit ▁for ▁the ▁Japanese ▁Red ▁Cross ▁named ▁R ave 2 Save . ▁The ▁event ▁was ▁held ▁on ▁Saturday ▁April ▁ 3 0 , ▁ 2 0 1 1 ▁at ▁the ▁Mar ri ott ▁Den