Open beer / alcoholic container in business premises

I had a soak off and re application of gel toe and finger nails on Saturday 21st Sept 2024. While I was very happy with the service I am horrified that a gentleman came in and settled down for a pedicure with an open beer in his hand. This was around 12.30 .... I am horribly upset by this and need this to be addressed... I took serious offense to this and feel it should be looked into and I would like to know what steps / resolution has been taken.