If you are a Vegas local and live in the Southwest, you have to visit the M Resort. Tons of giveaways every week, great payouts on video poker, and Belvedere out of the beverage gun. In the summer, they have a great pool for the families and a party pool that gets crazy on Tuesdays and Wednesdays.
This place trumps Southpoint and Silverton for the area. Cheap gas at the Arco too.