License shouldn't be a problem in N Ireland...but as for the South?? Fecked if I know
Basically there are places springing up all over the place where you can actually have the ceremony eg Bushmills distillery!!!, carrick a reed rope bridge, Giants causeway....and any amount of hotels
(well don't take it as read any of the above places do carry out the ceremony).....but basically if the management have the appropriate license then you can do it anywhere outside of a church in N Ireland.
More wacky places springing up every week!
Some reception links here