Myspace was edgy and underground, then it got invaded by the masses and it was no longer trendy, so everyone went to Facebook.
Facebook was good for a while but now your parents and family are in every conversation. How much fun can you have in a nightclub with your parents watching everything you do?
Twitter is more like a massive dance hall filled with people shouting at each other. If you stand close to your selected friends it can be fun, and if you get access to the mic on the main stage it can be awesome, but the usual experience is that it's filled with randos.
Snapchat is like.. I don't know. I lost interest in nightclubs before I could get into Snapchat.