As a regular beer drinker I don't normally ask for a taste of a beer before I buy, but I know some people whose experience of beers and breweries is not so broad as my own, and have been reassured by the chance to taste a beer before shelling out the nearly £3 for a pint.
I was most surprised to find that the Derby Brewery Tap does not offer tasting of the guest beers it sells. I took this up with the manager on duty. He told me it was company policy, and that "we take a gamble when we buy a beer from a brewery, so the customer can take a gamble when they buy from us". I find that attitude very mean spirited. Even if 20 people a night request a sample of a beer before buying, which is unlikely, it probably wouldn't even cost them the price of a pint.
Contrast that with the Flower Pot. Not the cheapest of Derby pubs by any means. I was in the Pot on Friday night, and a customer overwhelmed by the choice of ales available was gratuitously offered a sample of any beers before buying.
As far as I know the Brewery Tap is the only Derby ale house to deny beer sampling, and it's only the second pub I've encountered nationally with such a policy. Unless anyone knows any differently...
Regards, Lee Blower.