If you can't jet off to a private retreat for the summer months, aren't you glad you live in San Francisco? We've put together a complete outline of fun, entertaining, exciting, and, yes, even rewarding things to do between now and Labor Day, right here in this Summer Guide. Our writers pack a picnic for seizing a perfectly glorious day by the bay and learn to sail on it, too. Find out how to help city kids on summer vacation, and help yourself to the best upcoming concerts, films, and special events of the season. Check it out, and enjoy the season.