The male/female rock duo formula is a time tested tradition. Whether it owes to the simplicity of the setup, the contrasting timbres and harmonies possible, or some sort of subliminal sexual tension is anyone’s guess. But from Richard & Linda Thompson to Quasi to the White Stripes to Sonny & Cher, and even, um, Roxette, there’s no denying its appeal. The Aquarium popped up in D.C. a full half decade ago, quietly building a following…

MONDAY >> As much as we’d like to crack whiplash jokes, apparently the joke is on us as thrash metal group Slayer plays the first of two sold-out shows at the 9:30 club (the second is on Tuesday). As one of many sold-out 9:30 club shows this week, we can only suggest Craigslist if you don’t have your ticket to this headbanging extravaganza. 7 p.m. TUESDAY >> Local experimental darlings Hand-Fed Babies, with their unique…