HBT. I've been here a few times with a group of friends for late night eats and dinner. The atmosphere is very rustic. Every time I went, there was usually wait time of 30mins.
The concept is fusion. The kimchi fries and kalbi/unagi tacos are a must have! The prices are reasonable but on the higher end of reasonable. The Soju flights are something to try. Basically they infuse either ginseng, cucumber, lemon, (theres more) into the soju.
HBT would be a place I would recommend friends to try out. The only reason I'm giving it 4 stars is that it could be less expensive.