No Minors in Pool Halls

Minors under 19 years old are not permitted to enter pool halls in Preston, Idaho (Ordinances Section 9.76.010). Section 9.76.030 states that "It is unlawful for any minor under the age of twenty (20) years within the city to resort to, or frequent any pool hall, within the city."

So, 18 or under cannot even enter a pool hall, and 19-year-olds cannot resort to or frequent one. What exactly does it mean to "resort to" a pool hall? And how do they determine what constitutes frequenting a pool hall? Once a week? Every other day? And who's supposed to keep track of every 19-year-old that comes in?