Left to right, Brent Robertson, Tom Denklau, PGA Director of Golf for Indian Lakes Resort, Glenn Robertson and Struan Robertson stand near a putting green. Back9Booking.com, started by the Robertson brothers, is a website where golfers can access available tee-times in "real" time at 60 to 70 Chicago-area golf courses and book them online. Indian Lakes Resort Golf Course in Bloomingdale has already signed on with the service. March 8, 2012. | Richard A. Chapman~Sun-Times

Brothers left to right, Glenn, Struan and Brent Robertson along with Tom Denklau, PGA Director of Golf for Indian Lakes Resort, stand in the pro shop. Back9Booking.com, started by the Robertson brothers, is a website where golfers can access available tee-times in "real" time at 60 to 70 Chicago-area golf courses and book them online. Indian Lakes Resort Golf Course in Bloomingdale has already signed on with the service. March 8, 2012. | Richard A. Chapman~Sun-Times

Left to right, Brent Robertson, Tom Denklau, PGA Director of Golf for Indian Lakes Resort, Glenn Robertson and Struan Robertson walk to the clubhouse. Back9Booking.com, started by the Robertson brothers, is a website where golfers can access available tee-times in "real" time at 60 to 70 Chicago-area golf courses and book them online. Indian Lakes Resort Golf Course in Bloomingdale has already signed on with the service. March 8, 2012. | Richard A. Chapman~Sun-Times

Left to right, Tom Denklau, PGA Director of Golf for Indian Lakes Resort, walks with brothers Glenn, Struan and Brent Robertson near the clubhouse. Back9Booking.com, started by the Robertson brothers, is a website where golfers can access available tee-times in "real" time at 60 to 70 Chicago-area golf courses and book them online. Indian Lakes Resort Golf Course in Bloomingdale has already signed on with the service. March 8, 2012. | Richard A. Chapman~Sun-Times

Left to right, Brent Robertson, Tom Denklau, PGA Director of Golf for Indian Lakes Resort, Glenn Robertson and Struan Robertson stand near a putting green. Back9Booking.com, started by the Robertson brothers, is a website where golfers can access available tee-times in "real" time at 60 to 70 Chicago-area golf courses and book them online. Indian Lakes Resort Golf Course in Bloomingdale has already signed on with the service. March 8, 2012. | Richard A. Chapman~Sun-Times