For the sake of completeness let me repeat that we did meet as church on Wednesday night and it was, "only a prayer meeting". We briefly sang and I read from Zechariah 12:10, we discussed topics briefly and then we prayed. All over by nine. It is one of several prayer meetings this week.
The similar phrase 'Worldly Christianity' is one used by Bonhoeffer. 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.