It’s strange to think that Jamie Muscato fell into musical theater.“I never really wanted to do it,” the British actor says about belting out stage hits in front of a live audience. “I already knew from however old I was, 10, that I preferred the acting side, and was kind of embarrassed and scared about the singing side…[But] it turns out I can sing quite well.” We’ve weaved our way to Kerridge’s Bar, nestled at the back of London’s 5-star Corinthia Hotel. Its low-lit, leather-laden decor is a welcome break from the sticky city heat, though the two iced teas...