breaky heart? that catapulted country western line dancing to the mainstream. with the more modern soul offul twist is as popular as ever. anita mullen has been teaching soul line dancing inuty of it. any time anyone thinks about line dancing, they think about country western. >> reporter: each week, more than 60 people show up to step, slide and turn. >> i'm 85 years old, i just enjoy the togetherness of line dancing. >> reporter: why do people crave to come back? >> simple steps and exercise. >> you look like you can handle it. >> reporter: i was a bit nervous at first. >> everybody good with that? >> reporter: but with each step came confidence. i have this one. and comradery. you guys are awesome. from the cupid shuffle to the wobble. soul line dancing is a nationwide phenomenon. down in houston, texas, sheryl williams, the line dance queen, has turned the craze into a booming business. >> i love to have fun, enjoy myself. it's just my passion. >> reporter: her students, both young and old, share her enthusiasm. >> i love to dance! >> reporter: back in harlem, after nearly two hours, i'm all out of moves. i think i'm dripping sweat right now. but i'll be back. and ani