Hot clubs in Gangnam-Gu and Table Reservations?

Traveling to Seoul soon and would love to experience the scene in Gangnam. Last time, I hung around Hangdae, but looking for a change of scenery. What should I check out? Last I heard the hottest spots were Ellui, Octagon, Eden and Answer. Has something changed? Also, for those in the know, what are table d'hote prices (table reservation)? Particularly interested in Octagon and Ellui. Thanks.