Paris Opera Ballet's 'Giselle' is a promising summer dance offering
Washington's summer dance calendar may be on the light side, but this is no time to resign yourself to the couch. (Reruns, really? I know you're more adventurous than that.) Keep those strappy heels and maybe a tie at the ready; prepare to pack the watermelon gazpacho and a thermos of juleps into the picnic basket. Whether dressed up or open-air casual, you're likely to find a bit of soul-soothing paradise on area st…