It is a private place in which you can sing and dance with family and friends, as an alternative to singing over a stage in front of strangers. To actually enjoy all the highlights of Seoul at night, I extremely recommend reserving a guided tour with a local. A guide https://finnocnzl.newsbloger.com/32438011/the-smart-trick-of-top-10-gangnam-night-tours-that-no-one-is-discussing