Royal Resorts timeshare presentations
As Buceo points out, the Royal Resorts may offer to take you to the Haciendas for the day and treat you to brunch/lunch. Go for it, and you have the option, choose the lunch buffet at the Haciendas. Brunch there or at the Sands is very good, but the Haciendas lunch is even better.
The Royals don't have to apply pressure - their timeshares will sell out without it. It's *possible* that you might get a new and overenthusiastic sales person, but that's not generally the case.
As far as other timeshares go, watch out for some that will try to sign you up at the airport and will want you to pay a deposit. DO NOT pay a deposit. People have gotten burned doing this.
Also watch out for some places that will claim to be Royals - the only real Royals are VCI (also known as Club International de Cancun), Royal Sands, Royal Mayan, Royal Caribbean, Royal Islander, and Royal Haciendas. The "Royal Hotel" and "Royal Sunset", among others, are not Royal Resorts.
Some friends went on a presentation at the Moon Palace - lots of pressure and promises, to which they said no - but they did enjoy a nice lunch and nice day at the pool.