Possible Clues:

• Bill and Paul, having company, quietly sinking a little port
• Fizzy cola - a cup drunk inside a bay on the Pacific
• An international company admitting university lecturer in foreign resort
• Resort on the Pacific coast of Mexico
• Mexican holiday destination
• City of dangerous dives puts a limit on alcohol (finally!) in genteel company
• A top university originally lit by gas in a Mexican city
• Mexican Riviera resort
• Resort in which one of Juliet's kin abandoned alien commander
• Mexican Pacific port