The gunners pub, or the 12 pins...12 pins is near Finsbury Park Station, Gunners Pub is in Highbury proper, near the old stadium. oh the memories, I haven't been to a single game this season, miss is it so bad.
The Tollington on Hornsey Road & The Eaglet on the corner of Hornsey Road & Seven Sisters Road are a couple of decent pubs
Plimsol arms on St Thomas St. It's a bit of a walk from the ground, but good if you're coming/going from Finsbury park
Another shout for the 12 pins - cracking pub, and thoroughly enjoy the atmosphere during televised games Last time I was there was for the Man City away game Normally stay in the Pembury hote up the road when I get a chance to visit.