All songs are love songs. That is if you believe Charles Darwin’s claim that music, like birdsong, developed as a vehicle for sexual selection (indeed, a good voice and a sexy Les Paul go far). But ...

While many of his generation listen to pop, hip hop, country or electronic dance music, 25-year-old Chris Ruggiero embraced the singers and pop ballads of the ’50s through ’70s. “When I grew up, I ...