The Pinner Arms is served by bus routes H11 or H12 from Pinner tube station. Buses run approx every 5 minutes (towards either Harrow or South Harrow) and the journey to the pub is only 4 stops. The bus-stop is immediately outside the pub in Whittington Way. (If you are unfamiliar with the route, you can ask to be set down at the Whittington Way bust stop).
As you face the pub, the Function Room is located on the right hand side of the building and has its own set of double doors.