Joining CAMRA is worthwhile and not expensive (from just £23 per year).
CAMRA offer a range of prices to suit individual circumstances including single and joint memberships, with concessions (from £15.50) for people older than 60 and younger than 26. Life Memberships are also available for the die-hards. You receive discounted rates if you opt to pay by direct debit.
See CAMRA website for the current membership rates.