There are Sega Arcades all over Tokyo (especially in Akihibara! They are really nice establishments, with wet towelettes at all the games so you can wipe them off before use and wipe your hands after use. They also have competitive gaming there, with tournaments often times. Though they are smoking facilities, so that's kind of foul to smell your neighbor smoking while you game... I liked browsing through them and also seeing what the prize-games had to offer, even though we didn't play any video games!