Yakiniku Champion 焼肉チャンピオン
This restaurant serves some mean yakiniku and is reasonably priced. You can go with friends and family or with a date, the atmosphere is comfortable and welcoming.
The courses start at 3,800 yen for an "omakase course" (you let the chef choose). It comes with kimchi, beef stew, beef tongue, salad, etc.
The lunch buffet is super cheap and has a 60-minute time limit (1,200-4,300 yen).
Daitoen's interior is beautiful and elegant and is a great place to bring a date. The lunch menu is incredibly affordable and delicious. Dinner also is, the courses start at 4,100 yen. Not only is the meat incredibly tender and delicious, but the service is also first class.
Nikuichi in Hakata is a few minutes from the station and is very easy to find. The atmosphere and decoration is inviting and is a nice place to come with friends or a date. You can have the meat with just salt or some "tare" (sauce) and it's awesome. The skirt steak is particularly good!
One Karubi Premium ワンカルビPREMIUM中洲
This restaurant is almost unbeatable in terms of the quality-price ration. You can all have the all-you-can-eat course for 3,080 (limited to 2 hours) and it's even cheaper if you're over 50 or if you're a junior high school student or younger. You can order from 48 items without worrying about the final bill. There are salads, ramen dishes, Korean spicy dishes, etc. And for 980 yen more, you can have the all-you-can-drink option. You'll leave really happy and satisfied.
Yakiniku Miyanaka 焼肉みやなか
Yakiniku Miyanaka is an upscale restaurant which serves outstanding quality meat. The atmosphere is elegant and refined so it's a good place for a date or having dinner with friends. This restaurant is slightly pricier than other yakiniku restaurants, however, given the quality, it is well worth it!