Last year when I went to Sunny Spot in Ikebukuro, I left my camera on the bar. In fairness to myself, I was away from my seat for an extended period playing guitar, and during that time other people crowded around the spot where I had been sitting, which helped me forget the camera. But Yumi chan was very nice about it, and promised to keep it for me...a promise I took full advantage of by not going to get it for a month!
Taking a minute to think about the decor, I'd just classify it as 'modern izakaya' since a lot of new places look like this - warm wood, clean style. You could call it boring or formulaic, and you could also join me in being worried that they just stamped the place out of the same mold that some of the chains use (it's not that different from a Watami or Shoya, I guess) and weren't putting any effort into the food. I was nervous, but trusted the fact that they had nice-looking sake, and also fish displayed at the counter. These are sorta gimmicky touches that are common to places like this, but I could be happy forever with a steady stream of that type of place. If you're tired of really fresh ingredients prepared well and with clever touches...well, you're tired of life.
I love this kind of place. I hope you do too. It's almost worth a trip, on a weeknight, just to unwind after work. And if I lived here, it would be a go-to destination (although there would likely be weirder issues if I was living in Nishi-Ikebukuro. It's really seedy.). Keep it in mind, OK? They deserve to succeed.
Holy crap, they're open until 8 AM. Last order is at 7 though, so make sure to get there in time.