Make sure to check your bill if you're paying with card.
They take advantage of you being "drunk" and charge you an extra $10 so the bartender/servers can keep for themselves.
This happened to my sister 3 times- our round of drinks was $45 but they charged her card $55.
I payed for bottle service which was $190 in US dollars but they charged my card $200.
I asked them why they charged me $200 on my card when both of my servers said it was $190.
They showed me they charged me in pesos which was $3,788 and said that was equivalent to $200 in US dollars.
They thought I was stupid or naive thinking I'd believe that. I know that 3,788 pesos equaled $190 US dollars.
ALSO, my sister payed for our drinks with cash the last time ($45 US dollars for one round, my sister gave him $60) the bartender put the 60 in his pocket and gave my sister back $5. She told him he owed her $15 back. He was in shock she said something and said "oh sorry." And instead of returning the $15 from the money he put in his pocket, he took money from the register and gave her the $15.
We would've tipped them that amount either way, but the way they try to rip off their customers is unsettling.
They take advantage of tourists, and think we're idiots.