If you want to go and check out some dance music in the U.S. you'll be immediately confronted by neon clad bros with their stupid tank tops, sunglasses, and overdeveloped bodies. They'll be pushing, they'll be shoving, they'll be shouting, they'll hit on your girl shamelessly, and they'll generally do their best to ruin your night, without even realizing that they're doing anything wrong. Sure, there are annoying jock equivalents in Europe, but nowhere near as many, and nowhere near as obnoxious. Generally, the vibe is good at gigs, and Europeans have been doing drugs at club nights for so long that there are no first-time molly using bros wiling out and ruining everyone's night.
Fewer bros = more fun. It's science.