CU is the largest 24 hour convenience store chain in South Korea. It has over 8,000 franchise stores and they say they, "Bring freshness everyday through a fresh and interesting assortment. Find all your needs and wants in CU."
The average number of CU customers per month is estimated at 7,000million. This is equivalent to every resident of South Korea visiting a CU store more than once every month.
Address: BGF Retail 405 Teheranro (Gangnam-gu, Seoul)