Domes
I like the idea of open/closed stadiums should a team be playing their games in extreme weather conditions. At least the fans can watch the games and avoid any cancellations. Toronto Blue Jays Sky Dome is ideal.... however bring on the weather conditions with open stadiums....used to...
I've always thought of the clubs having bright neon colored walls on the dance floor. Same with the floor changing color or showing a design....perhaps have music vibrations bounce off the feet giving people a great feel for the music......Music is just not audio...it can be visual.....