Have been to Anju a couple times and the food is consistently good. The food is a surprisingly well though out and tasty. Usually I get sick at the thought of fusion. I have just seen it butchered too many times. Not at Anju, the chef has both talent and the creativity sufficient to make fusion more than a buzz work for expensive ethnic food.
If you are booking in advance for 4-6 people, get the bo ssam party order, it is amazing. It is a pork shoulder, oyster & kimchi lettuce wrap. The pork is slow roasted and its unbelievable.
Other than that, the sweet potato fries are really good and the roasted asian pear pie is different and delicious.
If it is more of a party night, try the yogurt soju (korean sake highball mix). It is easy to drink, carries a punch and comes in a very neat holder that keeps the ice from diluting the drink. My personal favorites are the aloe and orange juice mixes.
Have a great time.