There has been some discussion in the Agoracom Forum Leaders hub on the need for some non-specific hubs... In reply Agoracom posted this:

"Thank you for your inquiries and your responses. We really appreciate it. As mentioned if any member is interested in starting a Gold Hub, Silver Hub, trader Hub or anything else you would like us to set up, please use the HUB Request Form or contact us via our General Inbox with the following info:

Hub Name

Private or Public HUB

We'd be happy to set up a forum catering to your requests.

Kind Regards,

AGORACOM"