A Bar at the Folies-Bergere is one among the most known of Manet's paintings and a lot have been written to explain numerous of it's aspects especially the reflection on the mirror that doesn't follow optical rules.
Speculations about the girl's gaze - it seems to me she is completely absented minded - is another topic. Is she staring at us?
The bottles, the crowd...
Lately I just feel like watching at the paintings I like without analyzing