Newcastle fan here,
There's over 100 pubs within staggering distance of the ground so you're spoiled for choice. None of them are 'away' pubs and you'll be welcome in all as long as you don't act the arsehole. Even be welcome in the Strawberry which is the traditional home pub just outside the ground. I think away fans aren't allowed in the Stack which is a fanzone, but if you're not wearing colours I don't think they check your memory of Fabrice Pancrate or anything.
Personal favourites are the Forth Hotel, Tilleys, Mr Alexanders, Trent House, and of course the Strawberry.
Away fans often meet up in the Mile Castle because it's massive, but whatever you're after there's loads of choices. Plenty of good food options too.
Anyway, hope everybody coming up enjoys the away day. If not the result.