Erving Goffman would call this "backstage".
One of Erving Goffman's insights is the degree to which individuals take part in introductions of self. Front-stage conduct is the show implied for 'public' utilization: clever, urbane, unsafe, keen, smooth, rational, scholarly etc. This relies upon the gathering of people, obviously, and it is intended to make oneself look great. Backstage conduct is nearer to the genuine self, less varnished, less a demonstration.