Sam's was one of the first restaurants I visited in Nagano. I liked the Indian style music they played in the background. The decor was very South-East Asian to match the cusine.
The tables are equipped with cooking plates so that you can cook your own yakiniku (Korean style BBQ). There are seperate booths for privacy. Very modern facilities and one of the largest dining areas I have seen in Japan (outside of hotels!).
My favourite menu items were Vietnamese Spring Rolls, Ceasar Salad, Fried `Ebi`, Yakiniku and Sams' groovy non-alcoholic coctails.