This is easy...
Breakfast= La Cueva del Chango or the push cart tacos. If you get up early enough you can do both

(just get 2 tacos at the carts)
Lunch= Babes
Dinner= HC Monterrey (La Pesca and Chicago Don Jose are popular too)
Edit: forgot the drinking part...I would do a lot of walking up and down fifth...have a drink (Tequila Barrel to people watch) then move on to the next bar...have a drink...more walking on fifth. Find a spot you like and drown away