Hypen or no hyphen? Coop or Co-op?

Vicki writes: Now I find myself looking for words with incorrect apostrophes but now we need to also look for incorrect hyphen usage. Coop is a place where chickens live, yet Calgary Coop is also a grocery store according to most people. For a $1 one-time investment, you can become a member of Calgary Coop or Calgary Co-operative and enjoy a lifetime of benefits.