Spanky,
There is never any reason to change your money with the "guys on the street". There are cambios open on Saturday, although they are all closed on Sundays. I would try the FX Trader inside HiLo when you arrive on Saturday.
As for the "singles" ads you are referring to - please note that those are Google ads and Google determines which adverts you are seeing, not Negril.com. Google lets you see only the ads that they feel are of importance to you. Apparently you have been clicking on or searching for "singles" sites and they are now letting see those adverts.
