Hours Of Operations Sleep Number New York Lake Grove 11755 Sleep Number Hours of Operation and Location in Lake Grove, NY 11755 4.2 - 84 votes 1 Smith Haven Mall, Lake Grove, NY 11755 (631) 979-2350 Get Directions Sleep Number Hours Category: Home & Garden Hours Hours may vary due to season or holiday reasons. For specific hours, please contact store directly. Map Explore Lake GroveView More Apparel Burlington Coat FactoryColdwater CreekH & MCarharttJCPenney Sports LA FitnessGolfsmithDick's Sporting GoodsSkechersVans Jewelry Burlington Coat FactoryZalesKay JewelersChico'sJewelry Exchange Recommend For You Disney Store ADT Build-A Bear Workshop J. C. Penney Bally Call It Spring Champion Crossfit Forever21 Hollister