Where to enjoy a pint of Grain beer

These are the pubs where you can usually find a pint of Grain:

Black Swan, Homersfield, Suffolk
Alexandra Tavern, Gladstone St, Norwich
Norwich Arts Centre, St Benedicts St, Norwich
Royal Oak, Poringland, Norfolk
Swan, Harleston, Norfolk
King's Head, Magdalen Street, Norwich
Playhouse Bar, Norwich
Trafford Arms, Norwich