SOUTH LAKE TAHOE, Calif. – BlueZone Sports gave $10,000 to four Tahoe nonprofits over Labor Day weekend, $2,500 to each. The money came off the floor of the shop’s biggest sale of the year. Everyone who shopped that weekend had a hand in it. Five seasons in, the total has passed $50,000. BlueZone Sports has outfitted South Lake Tahoe for nearly a decade. The Labor Day sale pulls product from all five locations and opens a day early so locals get…