UNLV has some great curbs in the back of the free lot S near Paradise and Harmon. Most of my curb skating when I want do specifically that, is to go there. Other than that I feel that we are unfortunately not so blessed with the plethora of curb spots like Cali has. Other ones I've enjoyed have been the diy curbs at Guinn skatepark or various parking blocks in random garages you'll find here and there.