Making open space on internet

Making open space on internet for everyone who want to
do some business.
Everyone bring idea on this space and talk each other, help each other,
advice each other, collaborate each other about business.
If it works, it's good for me and everyone.
But I have no confident moving on this idea.
Is there someone who want to handle this kind of site?
Or is there someone already running this kind of site.
If there is, I want to join.