Pride of America is a brand new ship, so not too much info is out about her yet. Anne Campbell (the owner/editor of this site) wrote an article about this ship because she was on a tour of it while it stopped in New York.
As for 18 year old activities, dont think you will be legally allowed to drink, this is a US flagged ship so US laws apply, which means the drinking age is 21! Also due to this US flag there is no casino... But who needs all that? Your in Hawaii!?