Planning to spend Labor Day in Las Vegas? We have found some of the most popular, fun, and interesting things to do in Sin City this year! You can spend the big three-day weekend attending concerts, hitting  pool parties, taking in a comedy show, and then dancing and drinking in the top rated night clubs! Kids are getting ready to head back to school and football season is right around the corner, but before everything turns into Pumpkin Spice this and Pumpkin Spice that, summer has one last big weekend! When we began looking at how to spend Labor Day…