And to try to get rid of the hangover.

Lazy Westerners, never up before ten.

Yeah, four bottles of wine take a long time to sleep off.

I think she means she has to sober up.

Here 'since' is being used in the same way as 'because'. 

You better hope Rocco doesn't have any contacts on the train.  You know that's how they like to transport the narcotics. 

Whoa!  Now that's a serious first date, my man.

It wasn't Diego, you were scared of Rocco.

Is it worth a pair of cement shoes, Mikey?

Rocco has contacts in Sicily, you fool!