Possibly no music venue in London has quite as intriguing a backstory as the Union Chapel in Islington. The 19th-century Gothic Revival church, with its mosaic floor, its carved ceiling, its stained glass windows, and its chunky brick belltower, is a sight to see of itself. But since it began hosting gigs to help pay for the building’s restoration it has become one of the trendiest and most popular music destinations in the city. It has hosted everyone from Bjork and Patti Smith to Ryan Adams and Elton John, yet still very much operates as a church, with a liberal, progressive congregation supporting an outreach that’s as musical as it is Biblical.