No offence taken.don't worry!From what you have written,the place is the one I mentioned,especially as you described the Famagusta-Dherinia road with the Petrolina petrol station belonging to Anna Michailoudi on the left that is now derelict and has a guard post inside it( I saw her many years ago when I lived in Limassol and she had another petrol station there along the road up towards Polemidhia near the bottom end up from Makarios avenue).The turning left goes to Ayios Memnon and I think the beach bar is what used to be the Kalamies taverna.Of course I would really love to go there but am sure I would not be allowed to- a Turkish-Cypriot friend from London who I met when I was in the north two years ago said that although he had been a few times,you have to show either a Turkish passport or I.D. card or T.R.N.C. documents or the soldiers will not let you pass the checkpoint.....he also told me that once when he and some friends had stopped on the way out to have a look at some petrified orchards, a bunch of them had spring up from nowhere waving rifles and made it quite clear that it was forbidden!I wonder if it can be seen on the Google Earth photos and maps?
Have a good time in Istanbul!