COUNTY RENEWS EFFORT TO GLEN ISLAND CASINO
THE Glen Island Casino, the empty former nightclub on Long Island Sound that was popular in the Big Band era, is in the limelight again as Westchester County, which owns the casino and the park where it is located, renews its efforts to find an operator who will restore the facility's image. For more than two years, the administration of County Executive Alfred B. DelBello has been soliciting proposals from entrepreneurs in the hopes of realizing the potential of the New Rochelle site, where Glenn Miller, Ozzie Nelson, the Dorsey Brothers, Glen Gray, Claude Thornhill, Tommy Reynolds and Shep Fields once filled the hall with the sounds of swing. Tomorrow, the County Board of Legislators is scheduled to hold a public hearing on the administration's latest selection, a proposal by a group of investors who want to lease the casino for at least 10 and possibly 25 years and spend an estimated $1.7 million to make it a ''premier'' seafood restaurant and catering establishment, featuring weekly nostalgic ''Big Band nights.'' While the lease could be voted on by the Board tomorrow, setting the stage for the casino's revival perhaps next year, quick action seemed doubtful last week. Some of the lawmakers announced they would not be ready to decide until they could learn more about the proposed lease and the individuals who would be taking over the Casino. The administration, in April 1981, had proposed a lease with another bidder, the owners of the Lighthouse Restaurant in Yonkers.