This may not work for you, but when I deliver a cake to a hotel, venue, restaurant, etc. I will post a picture of it on my FB page and write in the description something like “Delivered this cake to @AwesomeVenue today and the place looked great!” It will show up on your page, but it will also show up on Awesome Venue’s page as well. If someone was at that location and saw your cake, they could go to the venue’s page and see tha it was you.
Jenniffer White, Cup a Dee Cakes - http://cupadeecakes.blogspot.com