Last night, my wife said she was too tired to cook, as was I, so we walked next door to the local tavern. We sat outside, it was a nice evening. They were hosting a pub crawl complete with H'ween outfits, which were somewhat interesting. My wife loved it, she was taking photos of most of them who would pose. They were all 20-somethings, some of the ladies were a bit risque in their outfits. We had a nice dinner and pitcher of Sweetwater and had some fun with the attendees strolling by.
In our building, we have had some 1-2 year old kids come by, only after we sign up for the visit, and that's kind of cute. On the whole, it has been by far my least favorite "holiday". When my kids went to college, I'd leave the lights out as a sign I wasn't participating. That worked.
For the 20-somethings above, it looked like a bit of harmless fun. One guy dressed as "Macho Man", I had to explain to my wife what most of the costumes were about. Some of the gals dressed as "nurses", of a certain kind.