It's Dragon Con, after all, and this is the most normal ... the party is still jumping Sunday at 1 a.m. Throngs of people bounce on the dance floor as lasers splay out above their heads.

The event, called “Kinryu-no-mai” (golden dragon dance), is normally held twice a year, in spring and fall, at the famed Sensoji temple and Nakamise shopping street. But it was canceled in ...