To cruise with the California crowd, you need to drive alfresco. "Finding a convertible in California in the summertime should be fairly easy," said Sean Comey, a spokesman at AAA of Nothern California. Most of the big-name rental car companies stock convertibles; however, they may place restrictions on the higher-priced models -- mainly, the pickup and drop-off must be in the same vicinity or city. In addition, prices are higher when you rent one way.