Denny's said Monday that it's being acquired by a group on investors in a deal that will take the breakfast chain private. Denny's board unanimously approved the deal, which values Denny's at 620millionincludingdebt.Denny′swillbepurchasedbyprivateequityinvestmentcompanyTriArtisanCapitalAdvisors,investmentfirmTrevilleCapitalandYadavEnterprises,whichisoneofDenny′slargestfranchisees.Undertheagreement,Denny′sshareholderswillreceive6.25 per share in cash for each share of D ...