Primario restaurant in Barcelona, uses QR codes to facilitate the public an updated daily menu. Many curious have read it to guess whatpara is hidden behind this QR code. Whether it is day or night, as if it is sunny or cloudy, you can read the poster because it is backlit.
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AVUI newspaper has published an article [catalan] about the QR code technology arriving to Barcelona and it also highlights the QR Channel social network.
The Italian restaurants I Buoni Amici, Panino Capriccioso and Mandi Mandi have also prepared special offers encoded inside QR codes. Catch their QR codes and get informed about these unique offers.