This debut breezes by in less than half an hour — a mere fraction of the seven months that its creators, a married couple from Denver, spent living and traveling together on a sailboat before recording it. (Cape Dory was the name of their craft.) They memorialize their adventures with 10 nautically themed love songs. While the album feels underwritten at times, Tennis? winsome harmonies and reverb-y strumming often recall the charms of early-’60s pop. B