A cocktail is more than a segue to dinner when it's a Sazerac, an anise-laced drink of rye whiskey and bitters indigenous to New Orleans. For Wisconsin native Sara Roahen, a Sazerac is also a fine accompaniment to raw oysters, a looking glass into the cocktail culture of her own family--and one more way to gain a foothold in her beloved adopted city. Roahen's stories of personal discovery introduce readers to New Orleans' well-known signatures--gumbo,...