Non-smoking game centers?

Are there any non-smoking game centers in Tokyo?

Most people recommend Namco in Nakano for non-smokers. It isn't completely non-smoking, but people can only smoke in designated areas that are ventilated, so it doesn't affect non-smokers. I think a completely smoke free arcade would put too many people off, as it would be illegal for people to smoke on the streets in most wards, so this is probably the most you could expect. A few people have also recommended Sega in Kasai, but that's not very central.

most centres that are multi floor will have some floors designated as non smoking, most of the one i've been in are like this. Of course the hardcore gaming floors tend to be smoking.