Probably the most popular 'drunk pho' restaurant in Vegas, open 24/7 about a mile from the strip (easy 5 min cab ride for $6).
Nothing is better for sobering up / morning hangover meal than a tasty bowl of Vietnamese beef noodle soup with numerous types of meat and warm, filling, life renewing bone broth. Yes please.
Service and decor are excellent, food comes quick, it's fresh, hot and has tons of flavor. Throw in some lime and all your clubbing / late night shenanigan issues go away with only the fun memories of a wild night (hopefully).
They also serve coronas and other drinks for $4 and have tons of things on the menu, but i've been here 5 times, always for beef pho dac biet (special). Get it to cure all your issues. Line can be long at 3am FYI.