You can find locations and dates of upcoming Retrouvaille weekends on their website, www.helpourmarriage.org.
I am located in Tampa and volunteer to help that group. There are several other chapters in Florida. It does take a while to hear back from them as everyone is a volunteer and they fit the Retrouvaille work into their lives. They will call you. I don't know what dates you are looking at, but if it is not coming up in the next 2 weeks, they are probably not booked up yet. I know the Tampa group tries to accomodate everyone who registers.
Feel free to ask questions, I'll do my best to answer them.