Angelic Prayer meetings?

I was surprised to discover that Calvin held that the angels pray for us. To be honest, I'd never really thought about it.

With regard to the Angels a different view must be taken [than that regarding dead believers], in accordance with the different nature of their office. The care and protection of the pious has been committed to them. They must therefore, in obedience to God, be solicitous about our salvation; and they only discharge the duty assigned to them by praying for us.

'The True Method of Reforming the Church and Healing Her Divisions' (1547) in Calvin’s Tracts 3 volumes Calvin Translation Society Translated by Henry Beveridge Edinburgh 1844 (Eugene, Wipf and Stock, 2002), volume 3, p318

James Carey has some more thoughts on angels.