Once you've reached a 100% share of an area-for example, the Leisure King area-you can have a street bystander light your cigarette for you while you stand idle. Look for the people who bow to you as you pass. This can be also done on Majima's minigame, but it's faster to do Kiryu's. The man standing on Tenkaichi Street, nearby Serena, seems to do this pretty consistently. He only appears in the evening so if you're on Premium Adventure, you can change the time setting to find him.