What happened in those 3 hours?!

I randomly watched a snippet of a dance movie that was on TV yesterday.
I have no idea what the name of the movie was and wasn't familiar with the actors.
I tuned in to a scene where a girl was at a dance club and talking to another guy who was there. They seemed to like one another and were flirting but the girl said she had to leave because she had to be at ballet class in 3 hours.
I switched channels then came back to the movie
and
the girl was at said ballet class.
Her teacher didn't seem to be happy with her
and
said something to the effect of,
I smell alcohol on your breath! Where were you last night?!
The girl then shamefully admitted to being at a dance club.
Her teacher seemed outraged by this.
This was when I decided I had my fill of this movie.

Is it bad for people who take ballets classes to go to a dance clubs at night?
Why?
I don't understand.
Also, that's really gross that the girl still smelled liked alcohol after going to a dance club 3 hours ago.
This makes me think a few things:
1) She most likely didn't brush her teeth before going to her ballet class. Ballet class seems like something you should brush your teeth before going to.

2)When she was at the dance club she must have been doing more than drinking. She must have been puring vodka all over her body and chose not to shower before going to ballet class.

3) Maybe neither of those things happened and the real problem is that her ballet teacher is a raging alcoholic with low self esteem who just likes to accuse people of smelling like alchohol as often as possible because it makes her feel better about herself.

Since I have no idea what the name of this movie was,
I'll never know what really happened...