You're gonna wear a bit of a mask with everyone, whether you're aware of it or not. That doesn't mean you're not yourself, you're just yourself in a particular context.

Ideally, you want a manageable group of people with similar enough interests that the mask doesn't have to be that thick, and there's not so much switching. A lot of casual socializing is in part searching for that group. That's when socializing really becomes enjoyable.

Additionally, intoxicants can make everyone a bit more tolerant of unmasked behavior, which is one reason they're so popular.