Came here both times around 10-11 pm Fri-Sat and they are always busy, as to be expected. Never made reservations, but also luckily never had to wait. Guu and Guu Sake bar are a mission for me and my friends, but we all love this place.
First off, I love the staff - they're friend and so nice. They always refill our waters, clear our plates quickly and always easy to flag down. Even at 10-11 pm when the whole restaurant is packed, they still sound happy and cheerful. Knowing that they probably have been packed since dinner time, I give them made props for being able to keep their voices and keeping a positive attitude.
The food - Kinoko bibimbap is hands down my favourite thing on the menu and thank goodness its on their main menu. It's cheesy, sweet, the scorched bottom pieces are the best. Other menu items I've tried are Gyu Carpaccio, Yaki Udon, Brie Cheese, Takoyaki, Steak, Kakimayo (baked oysters), Green Tea cheesecake, Almond Tofu (must try) and creme brulee. I also like that they have specials every week? or so often and do collaborations between the other restaurants.
I recently got the opportunity to celebrate my birthday at Guu Sakebar, and I got the Sake shots. They all sang me happy birthday (I think - it was in Japanese), they took a picture of me and my friends, printed it, wrote me a birthday card and decorated it!