Gran Café de la Parroquia is an institution in Veracruz. I took the above picture in the late morning when it was quiet, but come evening the place gets packed.
The reason people come is for Café Lechero. In essence, it isn't much different than cafe con leche/latte/au lait, it is more the presentation that makes Lechero special.
You are served a glass partly filled with strong coffee. The waiter then clinks on your glass with a spoon.
Another roaming waiter brandishing a kettle comes by and artfully pours a tall stream of scaldingly hot milk into your glass. It is quite the production, and the end result tastes good, too.
Here is a video I found that gives you a feel for the process.