use google.
prince.org

this tends to lead to deadbeat forums.
That's pretty much the extent of it.
In answer to your question. No. There are no active forums dedicated to discussing R&B specifically. As suggested prince.org: where fans of Prince music meet and stay up-to-date is your best bet but it has seen better days. Most hip-hop boards have a peripheral interest, the more active the board the better and there are smaller online communities and blogs where R&B is discussed but no real 'forums'.
this is a dam shame.
theres nowhere to go to get my r&b chit off on the internet anymore..
I've kept very good tabs on what's happening in R&B over the years. Don't have the time/energy to dedicate a blog to it but can provide screenshots of all the decent to great albums released between 2011 and now.
prince?
im not trying to be posting around a bunch of fakkits.
them types give me the heebie-jeevies.