When in Vegas, I always make a trip to Grand Lux and only eat one thing of theirs: the Zen Noodles.
Yes it's totally a rip off ($15) spin of "pho" and also pretty white washed version of pho. But I like it! The broth is lemongrass flavored (not beef) and they use chicken. You add bean sprouts and spinach and ask for sriracha and you just made yourself a healthy pho! The broth is sour so don't expect a beef flavored. And you don't really need sriracha but I love it spicy. It's a really good spin on pho. My GFs and I always get this late at night! Since grand Lux is open 24 hours, we eat here after clubbing.
You don't know how many times zen noodles saved me from a nasty hangover!