Is it normal for girls to serve in billiards hall?

Billiards hall is a place where women often go. Because one of the work contents of billiard hall staff, swinging the ball belongs to the work scope of the waitress. Billiards is one of the ball games. On the billiard table, the player uses a club with a length of more than 9 1.4 cm to hit the white main ball according to certain rules, so that the target ball enters the bag. So swinging the ball in the billiard hall is a regular job.