Best ways to find band members in That London

Now and again people will post here looking for band members for their musical project. Nine times out of ten, it’s for people in #London.

Since it’s such a common thing here, I thought it might be useful to have a specific thread for the best places to advertise to find people who might be interested & suitable for a particular musical endeavour.

I’m guessing that posts to this board aren’t the most productive way, what with the posts being drowned out by spam and the relative low user count, but I don’t know what the best method is. I’ll bet some people here have a better idea though.

Those with more knowledge in this area, please share your thoughts and experiences for the benefit of others.