In one of the scenes where the Jay, Shel, Gal and Fiona are drinking, there is a close up of a wine bottle and some glasses. The bottle says it is a pinot grigio, but the wine in the glasses is red and they are only ever shown drinking red wine.
In the hotel lobby, Jay uses a chip and pin payment for their room. It is obvious that the Visa card being used is put in the wrong way round. The chip is directly below the Visa logo in the top left hand corner of the card which can easily be seen whilst in the card reader.