Our local club has a small business card rack on the info table at the Fair Displays along with ARBA Fair brochures. Members put their business cards out for the public. A new owner is given a seller's card to contact after the fair with any questions about their new bunny. The club has generic business cards made up listing a contact person, a little blurb about the club and to make it stand out, the club logo. One more very important thing, the club's web site. Fairgoers wanting more info can visit the club's web site at home long after the fair is over. You never know where a new member will be found.
VistaPrint is a great source for reasonably priced business cards. You can load your club's logo up onto it. Or the club can print their own business cards on purchased card stock.
The EMRBA club also had tee shirts and sweatshirts made up featuring the club logo. Members wore them at fair displays to be easily spotted by fairgoers seeking help. They make great show-wear also to promote the club.