I was in Tollington Park Baptist Church on Sunday. Again, this is a church slightly outside our area but I know some of the folk there and have had connections with them for years - yet another church where they have been praying for me over recent months. I was kindly invited to take part in the communion service at the end of the morning meeting. They use Praise! hymn book but have recently installed a projector too. I notice they have also retained the hymn board from the old building (I have mixed feelings about them but in combination with a book you can make some preparation for the singing part - with a projector and no printed order you have no idea of the shape of the service if you are a newcomer). A unique feature on the music front was the use of piped music to accompany us and that worked pretty well except that for some reason there was a power outage on it by the time of the last song of the day and we had to sing unaccompanied - thanks to a fine deacon we sang a capella and that was clearly the best. The church are currently without a pastor but praying fervently for one. Church officer Kevin Green preached morning and evening from Hebrews 3 taking 1-6 and 7ff in reverse order. Another officer gave a lively talk from Pilgrim's Progress as a sort of embryonic children's talk. We were around 25 in the morning and less than half that come the evening. There were a good range of people of all sorts though a little on the grey side I guess. Good to be there both times.
Bonhoeffer uses a similar phrase 'worldly Christianity'. It's J Gresham Machen that I want to line up most closely with. See his Christianity and culture here. Having done commentaries on Proverbs (Heavenly Wisdom) and Song of Songs (Heavenly Love), a matching title for Ecclesiastes would be Heavenly Worldliness. For my stance on worldliness, see 3 posts here.