Go to Pleasure Island! I was there the end of January and had a fantastic time. I agree you could spend the whole evening at the Adventurers Club and definetely get your money and time's worth. It is unique and very entertaining. I saw a number of solo women there.
The comedy club was also fun, and the countdown to midnight and fireworks are sweet.
its worth poking your head into all of the clubs, assuming no lines, just to see their setups. I thought that each club looked like what you would expect it to look like if it was a movie setting ("Okay, this next scene is in a jazz club. Dark, candles on the tables, semi circular set up ......etc")
I also did a solo evening at the Animal Kingdom Lodge, looking at the animals outside, then fantastic African art in the lobby, and dinner at Boma's. Okay, okay, I looked for the hidden Mickeys also!
kes