Adults looking to don their favorite Halloween costume and shake their groove thing will have their chance at Grant Street Music Room in Clarkesville. The venue is hosting a Halloween Costume Ball from 7–11:45 p.m. Saturday, Oct. 31, at 583 Grant St. A costume contest will be held with the winners receiving a rafting trip for four people. Then they can dance the night away to three bands, which will play a variety of music.