Every large hotel I’ve stayed at in Mexico will have those cards that say “water is safe to drink” near the sink but will also offer a complimentary bottle of water (500ml) but be careful some will also want to feel you a liter of Evian for 70 pesos. Getting water at Oxxo or another corner store is the best idea.

Smaller family hotels will sometimes have bottled water like a 10 litre bottle in a dispenser like an office. Others will have nothing. My favorite places to stay are these smaller places.

Mexican tap water is generally labeled as “safe to drink” in big chain hotels, all inclusive resorts and so on (ask the concierge about that) but us Mexicans have symbiotic relationships with our kind of bacterial life that you don’t, so as adviced from OP, DON’T take chances and drink bottled water. I know bottled water could be expensive in some big hotels so, bring your bottles from convenience stores like (oxxo, 7 Eleven) or drink beer instead.

If you like to party and clubbing, ask the animation team of your hotel for directions about the better/safest clubs. They can take you with them and hook your herb for you. Tip is excepected in this kind of thing.

A wise move is to make friends with the hotel bartenders / waiters, they appreciate cool, non despotic clients that doesn’t behave like morons. Treat them as people, learn their names, and you will surely enjoy the benefits of not being fooled with cheapo, toxic alcohol and spitted food. If you think that because you are paying you have control regarding what you eat/drink, remember that you have not. That pedro looking guy has.