These guys have what we call republican sunday. Either the first or third sunday of the month is open to the general public. I have never shot there but have heard that it is an overcrowded madhouse. I have also heard that it is not that bad
http://www.scgaa.org/
This one allows non members to shoot for $10
http://www.titusvillegun.com/
Heres one in Lakeland that I also know nothing about
http://tenoroc.us/prices.htm