Try this:
Go to your bank and purchase a prepaid debit card. Not sure exactly what they're called. They work exactly as a VISA card...you can use the number to hold the room and pay the bill. There will not be a statement unless you specify an accurate address to which they can send the debit statement.
Hope this helps. Otherwise, think about renting a P.O. box in a nearby town, and have any C.C. statements sent to that, rather than risking a boss/wife/GF finding your bill.
Keep in mind that a couple "chica-friendly" hotels also house eco-tourists, families and business travelers. Hotel Presidente and Amon Plaza - Clarion come to mind. If you're in C.R. for business anyway, no need to hide these hotels.
