"and goes out to tea on Boar's Hill and to lectures at Keble"
Keble College, Oxford
Creative Commons AttributionKeble College, Oxford - Credit: Dimitry B, Flickr

As mentioned previously (bookmark, p.35), Charles Ryder's cousin Jasper warned against Boar's Hill, although it was not quite clear why he should do so.

Tea on Boar's Hill might have involved one of the various literary or scholarly figures who lived there in the early decades of the 20th Century. These included the poets John Masefield, Robert Bridges, Robert Graves and Edmund Blunden, as well as the classical scholar, Gilbert Murray. Boar's Hill was also home to the actress Lillah Emma McCarthy (Lady Keeble) who was a leading lady in several plays by George Bernard Shaw.

Keble is an Oxford College, established in 1870 in memory of John Keble, one of the founders of the Oxford Movement which strove to introduce a more Catholic form of worship into the Anglican Church.

The college was originally heavily involved in theological teaching, although this is no longer the case.  Both its religiosity and its modernity (in the 1920s) might have been reasons to be suspicious of those who attended lectures there.