Some friends and I tried Blue Grotto. It's just off Roswell Road in Sandy Springs. As you can see from the sign, it's a small-plate place, serving both sushi and tapas. I concentrated on the sushi. The tapas side seemed to me to be an eclectic mixture of small items.
This is the sasimi sampler. The presentation was very nice. The sasimi was certainly well prepared (some how well done doesn't seem like the right phrase for sasimi). I think I would have to put this into the date place category---perfectly fine but not exciting.