I live in Cheonan. Here are two meat buffets that I have been to. I also ate at a meat buffet in Seoul, but I don’t remember the name or directions. Out of all three, Mammoth Meat is by far the best one I’ve been too (ambiance, price, taste and service).
1) Dino Meat
Directions from Ssangyong-dong Yongam Mall (쌍용동 용암마울): Take bus 12 heading towards Shinsaegae. It is about 3-5 stops away. You will see it directly across from the bus stop where you get off. There are around 8-11 meats to choose from. You sit on the floor, but they honestly have the most comfortable butt cushions that I’ve ever sat on. It felt like Tempur-Pedic! Price is 16,000 won a person.
2) Mammoth Meat
Directions: Near the Lotte Mart that is by the Post Office, McDonalds, Baskin Robins, and Holic Cafe: Face out the door of Lotte Mart (looking across the street you will see the Holic Cafe in the building across the street on the 2F). Walk across the street and weave in and out of the side streets. You will find it.
It has a great ambiance, service and the food is wonderful. You can select from around 7-10 different meats. Unlike Dino Meat, there is also a large selection of delicious side–including steamed, skewered fish cake, potato salad, mandoo, ddeokbokki, and other salads. Price is only a measly 11,900 won per person! Unbelievable!