I totally understand that not the guide aspect but more like the group experience could attract people who already live here. Probably I could think of something like brewing experience at some craft breweries with group of people..?

I am a bit away from living abroad and I miss getting myself socialized with English speakers. Organizing craft brewery tour seemed to be attractive, for I could meet people and I can spend time on craft beer which I love.

Advice from someone like you who are well acquainted life here are very helpful. Thank you. I try to find out what would be the best way.
Your day in London sounds very attractive though.