Many people for health reasons need to drink pure water througout the day. The more alcohol and tea and coffee you consume the more water you need to drink to replace the water that passes through your body.
Allow people to take drinking water for personal use into all buildings, especially in places of entertainment including concert halls, sports stadium, pubs and night clubs. To buy water to drink is costly and involves queueing often as not. It is unhygenic to drink water from the toilets.