Tally Ho Inn at Aswarby (that's tally ho as in fox hunting rather than flying, by the way) is a really traditional pub. On the A15 south of Sleapit, not fat from the A52 junction to the A1.
Lincolnshire snorker baguette and a pint and a half of draught bitter is a good pub meal - or they have a restaurant if you want to impress.
Found their website:
http://www.tally-ho-aswarby.co.uk/
(I have no commercial or other vested interest in this - apart from it being a great watering hole if I'm on my way oop 't Nawrth to visit relatives!).
Oh - and it's the George at Leadenham. The Stable Bar used to provide a variety of 'entertainment' back in the 1970s....