The last time I went to Defcon, someone drove the security golf cart into the pool. Others were flushing bags of concrete down the toilet. There's damage, and then there is Defcon.
Black Hat is a bit more subdued. It costs a lot more to attend Black Hat. Black Hat parties are more like casual social gatherings. I believe that in Europe, country clubs are more likely to be called gentlemen's clubs. In either case, it's usually the richer people attending.
[1] https://en.wikipedia.org/wiki/North_American_fraternity_and_...