Spending a long weekend with the family in Mexico City, starting Thursday (wife has conference = tax deductible vacation!). None of us have ever been to Mexico before. So, a few basic questions:

1) With hotel, transfer, etc., all prepaid, how much am I likely to need pesos (vs using plastic)? Or can I use US $ in most situations?

2) The Intercontinental "El Presidente" -- I've read all threads from the past year on this property. Any suggestions for views, etc.? I have no status w/IC.

3) I have Admirals Club membership, and OW Plat status. We're flying Mexicana. Is there any lounge that's significantly better than any other?

4) Anything else people think a new visitor should know?

Thanks, in advance!