During the autumn festival in September, the bars in Jerez participate in a competition called Tapa Centro. Over 50 bars take part, and a booklet is published giving the list of bars, their locations and their specialities. There is a voting form in the booklet for which bar you think has the best tapas. The booklet is available from the tourist office, or any of the participating bars.
A very tasty way to supplement your bar crawl !