Except for Qari Abdurrasheed, I think the rest of the shuyookh are of the chishti silsila. Qari Abdurrasheed is a khalifah of Hazrat Moulana Zulfiqar Ahmed Naqshbandi. I don't think he is an Imam or a teacher at any Darul uloom so I assume his programs are conducted in his house. He lives in Flemingdon Park.