English electropop duo La Roux (composed of Elly Jackson and Ben Langmaid) shot to superstardom in 2009, dominating the dance charts with music crammed full of synthesizers and catchy/simpering lyrics. (If their sound seems familiar, dust off the ’80s shelf in your old LP collection, e.g. The Human League and Eurythmics.) On “Toy,” Jackson sulks in a falsetto, “It’s all false love and affection, you don’t want me, you just like the attention.” Sure, it’s been done before, but La Roux’s melancholy retro pop now seems refreshingly sincere in a genre that’s become too polished since the rise of Lady GaGa and her minions. It’s dance music for the dejected—who probably need it the most anyway. (All ages show.) ERIKA HOBART

Mon., April 19, 8 p.m., 2010