Summary:The Sands Point Preserve Conservancy presents renowned singer-songwriters Suzanne Vega and Duncan Sheik on Sunday, September 25th at 5 p.m. on the magnificent Great Lawn overlooking the Long Island Sound.   The Sands Point Preserve Conservancy presents renowned singer-songwriters Suzanne Vega and Duncan Sheik on Sunday, September 25th at 5 p.m. on the magnificent Great