Of the song by Drake. It is a fictional city made up of 3 city names (Houston, atlanta and vegas) where the 'lively' nightlife scene never stops. To be 'stuck in Houstatlantavegas' is to be having too much fun, by whatever means.
No Houstatlantavegas are the cities Houstan, Atlanta, Las Vegas combined into one word
The 3 cities Houston, Atlanta, and Las Vegas are well known for there strip clubs. The song is referring to a stripper or video vixen. Drake finds her overly attractive and wants to be with her. Her behavior (drugs and alcohol) constantly pushes him away but he keeps trying. It's sounds like some love shxt but, but he's really just trying to seduce her.