Read this carefully, as a misinterpretation could lead to an embarrassing misunderstanding. There are no concerts this week featuring the Christmas Juggalo Band. There isn’t a group of Insane Clown Posse fanatics with black-and-white clown makeup in Santa hats spitting rhymes about senseless violence during the holiday season. There may be sleigh rides, but definitely no “slay rides,” and certainly—well, probably—no songs about killing people. The word “bitch” will only be used to describe a female dog, if at all. There are, however, concerts featuring the Christmas Jug Band, a skiffle group of good-time fun-seekers who enjoy drinking whiskey and playing the empty bottles as musical instruments. They play on Friday, Dec. 21 (family night), and Saturday, Dec. 22, at Sweetwater Music Hall. 19 Corte Madera Ave., Mill Valley. 8pm Friday and 9pm Saturday. $17—$24. 415.388.1100.