Cardholder lounge with an unusual split footprint: one airside room in A (near Gate 4) and a landside food-court location in B (before security). Not Priority Pass. Amex lists premium food, spirits, Wi-Fi, and flight monitors.

Airline club on Terminal B—not on Priority Pass’s MTY directory. OMA lists 05:00–22:00. Better food and a quieter room than the contract OMA lounge when you qualify; everyone else should budget OMA Premium or gate seating.

Same OMA Premium product on the SkyTeam side of the field. Useful when your flight is in B and you do not want to shuttle to A or C. Not a substitute for Salón Premier if you already have Aeroméxico elite/Clase Premier access.

Contract lounge for the Viva-centric terminal. Same snack/drink/Wi-Fi pattern as A/B; still the clearest Priority Pass option inside C. Arrive before the published 21:30 close on late banks.