Found this great old photo of Miami Beach that's available through the LIFE photo archive hosted by Google.
CAPTION: Auto traffic along Collins Ave., the main street of the city, where 6 out of every 10cars has a non-Florida license plate, amongst a residential population of 20,000. Date taken: February 1940. Photographer: Alfred Eisenstaedt
The location shown in the photo is the Jack Dempsey Restaurant in the Dempsey Vanderbilt hotel he also co-owned. The Setai hotel now stands on the site of the original Vanderbilt hotel.