A silk scarf will not give the high-velocity rotations needed for an Iwer George show. At that inevitable point in the evening when the high-stamina Trinidadian soca artist starts exhorting the audience to “put up your hands and wave your rags,” it’s best to have a piece of fabric that will stir up the heavens with all the kinetic fury befitting Carnaval. You also need to have a flag (sizable, but unattached to the stick) boasting your national colors for the moment when George starts asking the crowd to represent. And, without a doubt, you will at some time or another be prompted to do the Iwer—a dance requiring heavy legwork, powerful knee bends, and fast-paced leaps. So bringing shoes that you can prance about in without getting any blisters is also advised. George performs at midnight at Crossroads, 4103 Baltimore Ave., Bladensburg. $15. (301) 927-1056. (Ayesha Morris)