Conga

(plural congas)

a tall, narrow, single-headed Cuban hand drum of African origin
a march of Cuban origin in four-four time in which people form a chain, each holding the hips of the person in front of them; in each bar, dancers take three shuffle steps and then kick alternate legs outwards at the beat; the chain weaves around the place and allows new participants to join the back of the chain

Full definition of conga