As you read this, Glastonbury-goers will be raising themselves from their tents, fuzzy from too many ciders after watching Adele last night. But forget the hangover bacon butty — the twenty-something hedonist crowd will be heading instead to the West Holts field to do some kirtan, call-and-response chanting based on ancient Indian texts, to clear their heads.
Friday night in London, and it’s a similar story. At the fortnightly candlelit kirtan at Mantra Lounge in Covent Garden, among the 100-st

