This is the main location for meetings for worship of Oxford Friends. The rooms in 43 St Giles (which included the old meeting room on the 1st floor are usually used for other purposes). Quakers are a christian denomination not multifaith, although meeting houses are often let for use of other denominations and faiths. See https://oxfordquakers.org/roomhire/the-meeting-house/. Incidentally UPRNs here & over 43 St Giles seem to bear little resemblance to actual organisation of site as I remember it or as described on website.