Guide to Refusing Service The NSLC will do just about anything to create awareness of the need to enjoy beverage alcohol responsibly and this includes using humour as a tool. The Guide to Refusing Service drives home a message that there are some customers who just can’t be served in NSLC stores. Don’t be fooled by this light-hearted approach. It’s serious and just another way the NSLC makes sure beverage alcohol is enjoyed responsibly. Any customer who appears to be under the influence will not be served in an NSLC store.