I truly don't believe there is such a thing as a last minute Cheapy Singles cruise. The main reason I say that is because I notice that Traveling Singles groups always end up with a long list of Singles wanting to cruise at the last minute and they get left behind. They put themselves on the waiting list.
My advise is to book early on a Singles cruise. I personally prefer to book a single supplement cabin if I don't have a friend to travel with. I don't want to meet up with a roomie from hell. I have had one really bad experience. Most of the time I had many very nice room-mates. I am able to afford my own cabin so that is my preference.
I think the vacationstogo.com Hosted Singles presently has great rates for their Halloween cruise on Oct.29th, on the Carnival Pride. It is very affordable and it will attract around 200 singles or more. There is going to be a waiting list too.
I have cruised and traveled many times with Singles and I know what I am talking about.
Note to Pat Hagan - I truly loved your article on "Ten Questions Singles Ask." The info is really accurate on single cruises. I have always cruised for just the joy of cruising with a group of singles to keep me company. It is always so much fun for me. Thank you, Luci