For a suite on the weekend your not going to find many deals. Vegas fills up on the popular weekends. You might try the
MGM Mirage Suite Promo Code: SUMTWR.
The code will only work for the first day or two and book the rest at full rate. Thats the only way I know of to get a suite at $250 a night.
the MGM Mirage is right across the street from the Venetian and Wynn. It has a great pool but you'll need to head out of the hotel for the good clubs.