Gracie Chavez recently livestreamed a Selena tribute set on the 25th anniversary of her death. Flash Gordon Parks, The Waxaholics, DJ Aggravated, DJ Supastar, The Chopstars, Donnie Houston, DJ Shante, even country/disco spinner Dave “Disko Cowboy” Wrangler — they’ve all been out there, starting their own soirees on Instagram.