Venetian Aroma

I just returned from Vegas. One question which pops in to my head every time I walk in to the Venetian hotel is why the hotel has such a strong smell of flowers or perfume. I don't see any flowers around. Where is it coming from? Well, I did a little googling and as of 9/2/08 www.scentair.com has the Venetian listed as one of their clients.