HI Graham,
Just ansewerd your other question about drinking. No you can't use pools from other hotels but Treasure Island has a pretty good pool.
http://www.destination360.com/north-...sland-pool.php
If your into shows I'd recommend seeing the show
http://www.destination360.com/north-...-las-vegas.php in your hotel.
Also outside they have a free show nightly called sirens its set on this ship with some s e x y dames.
http://www.destination360.com/north-...land-siren.php
Write back if you have more questions.