Kuumba Arts and Resources Centre
Kuumba Arts & Community Resource
You can always try asking anyone on Ujima Radio (the local African Caribbean community radio station)
Ujima.co.uk - Keep on Movin
There is also the Malcom X Centre in St Pauls (to my limited knowledge, there is a big Black community in St Pauls)
Malcolm X Community Centre - Welcome
Check this out too
St. Pauls Unlimited Community Partnership, and
BDA — Black Development Agency