Here in Northern California, it's pretty normal to roll at drinking parties (since the hyphy movement generally involves e and polydrug use in general, but grew out of hip-hop culture rather than rave culture), and that's probably my favorite. Actual e parties with trance, Vick's, and glowsticks aren't really my thing, but just showing up to a low-key party where everyone's drinking and smoking while rolling with a few friends is amazing. You have great conversations, the music is more interesting, and everyone's personality seems more distinct. If people get overly drunk and belligerent they can be kind of annoying while loved up, but you just have to be selective. And the things that drunk people come up with to do are a bit more creative than what people do just on e.
Depends on the group of people, though. I've certainly been to some awful drinking parties, but I've also been to some amazingly fun ones.
Never been to a general drug party, but I'll be throwing some sort of tripping party on my birthday, so we'll see.