Variations would have the character shaving, drinking coffee, looking at themselves in the mirror, settling down for a train journey while thinking about what happened last night. It's a device to frame the story, a way of writing themselves into the situation. What it does is lose the tension. We, as readers start here, and then we're whisked there. But 'there' has already happened. We know that Emma makes it home in one piece because that's where we started. The writer set a bench mark for the narrative present, so anything else is flashback.
As well as losing narrative tension, we have a lot of clumsy grammar - she had had, there had been etc. Plus, the action of applying mascara/shaving/drinking coffee is inherently neutral - it's like throat clearing. Nobody's interested in throat clearing, we want to read the action. And the action happened last night, which makes it about as interesting as hearing about someone else's dream.
There are writers who do flashback very well, but there is always a purpose to it. Clues are revealed to the reader which keeps their interest level high. But generally, wouldn't it have been much better to start: Emma walked into the bar and the first thing she saw was Joe.
PS Can't find my glasses this morning - apologies for any grammar/spelling mistakes/infelicities etc, but it's all a bit blurred.