Best travel for singles??

I'm 30, single female. What are the best singles travel clubs, cruises AND/OR destinations for singles in my age group?

Im interested in the Carribean mostly, but I am open to ideas. I just love water and the beach. US cities are welcome too.

Thanks!!!!
I've been to Cancun, Bahamas, and three islands in Hawaii so please take that in to mind... :O)

Costa Rico......many options...and Wind Jammer has several "singles" cruises...but my wife won't let me go on one...so could you take pictures for me? (hee hee)

How about Alaksa cruise. I'am sure it would very beautiful to see.

backpack back areas of sierra nevada it is awesome and bueatiful back here.the serenity and bueaty will want to make you never think about citues again

Check out Trinidad in February. They have Carnival which is a two day street party. It is a twin island state. Tobago always has something so try there. And it is in the caribbean