hmmmm... i usually would drive up to viewpoint near johnny foxes and have a few joints with my mates but in the last few months its getting too sketchy because of garda...
another great place to smoke in ireland is the blackrock baths.. they are abandoned and you dont get any hassle from garda.. only other people i ever seen in their were a few kids doing graffiti.. usually head out here if its sunny out and im in town i just hop on the dart..
but since im from tallaght i usually just smoke in my house or in the coocoos nest beergarden or tymon park.. theirs a lack of spots and smoke here