I dont think there is an answer to this,but my thouhts are this ,in the early days late 60's to early 70's in Nottingham ,the clubs played soul Reggae R&B, ,as time passed Reggae was played less, as a result up popped the blues bars or clubs ,usually in a deserted house cellar ,dont know why they were called Blues, cos blues as we know it was not played they played only reggae then in came funk as well as Reggae,and thes places were started and run by Blacks so if a white went to a blues they felt uncomfortable,I didnt feel uncomfortable cos i was quit well known by blacks and whites in fact the blacks moved on to funk and jazz funk,it was the white lads that did not move on ,Not an answer just the way it was
Bazza