Madtowndan...Couples is Jamaican owned and oriented, so no worries there...it's a good AI choice and a good introduction to Jamaica and Negril.
The pub crawl is an excellent choice and will give you a feel for the other end (West End) of Negril and walking the beach is always fabulous!

You'll learn lots from the great negril.com boardies and be well-prepared to venture out more for your second, third and fiftieth trip to Jamaica!