Went back to the Cinema I used to go to as a kid for the new Batman film (Wycombe 6 back then, no idea what it is now), and got a ticket & a large popcorn for £6. Bargain.
These days when I go it's either West End, which is a total rip off, or Muswell Hill Odeon, which has a classic art deco auditorium with a balcony, but utter shite to watch films in.
Wood Green isn't too far, but I'd have trouble avoiding the burger king.