I have toured it, but I'm not sure I can answer that specific question. My guess is yes, but maybe someone who has actually used the facilities will chime in.
There's not a traditional chin-up bar hanging from the ceiling, but there is a weight machine that simulates the pull-up motion. It's very similar to this:
This surprises me. There has to be a bar somewhere. It literally takes no space and adds a very popular exercise. I bet if you look close, there's a chin up area somewhere in that gym..
My last cruise was on the Wonder and I was in the gym every day, doing P90X workouts, which include pull-ups. It's possible that there's a bar hanging, but I'm 99% certain that there was not one when I was there.