This group is for people who work from home, or remotely, who like working in a room other people. The objective is to be in a quiet(ish) environment, similar to that of a library, while working alongside your peers, without the expense of monthly co-working space and with the flexibility of changing locations.
The group is not aggressively social, although it can take on that quality. Other benefits may include: motivation (think gym buddy keeping you on a workout schedule), better mood, and productivity.
All that's needed to host is a wireless internet connection and a few seats. (I'm sure no one will complain about coffee and/or snacks.) Having a bathroom helps too.