Who are the most influential people in town?

Problem: Need to find who are the most influential people

Context: The new sheriff just arrived in town. He gets report that the bad guys have already boarded the train in Phoenix and will arrive in another eight hours. He must find the most influential people in town to help him defend the town.

Constraints: Must solve the problem within eight hours.

Forces: He observes the following:
(a) A lot of people hang out at the saloon.
(b) There is a bank across the street.
(c) There is a grocery next to the bank.
(d) The banker, together with his beautiful daughter, lives in a house down the street.