The problems with small change are the extra pressure on the bar staff - some of us worked the full 12 hours at Melton plus setting up and making good afterwards! I can tell you that by 9 or 10 pm , when it gets busy and customers are buying rounds of 5 or 6 different beers you are glad that you haven't got to work out the amount in detail! Believe it or not , last year we even ran out of pound coins and the tought of maintaining enough change with a differential pricing policy is daunting.Plus of course the customers get served a lot quicker. We were fortunate this year that we were able to get good discounts on most of the beers and were therefore able to make a decent profit at £1 a half. Plus we had no overheads - the premises were not charged for for example. But other festivals perhaps need to charge over £1 per half , so either they mess about with small change in the tills or do the sensible thing and charge a flat rate using tokens.The token system has its drawbacks too of course. A friend who has experienced a lot more festivals than myself ( including the GBBF ) made the comment that those organisers who insist on the differential prices don't seem to be the ones putting in the hours behind the bar ! (Not a criticism - they have done a lot of work beforehand - but they don't experience the effect of their policy)