Denny's CEO Kelli Valade told investors that "underperforming" stores would be shut to raise annual unit volume sales to $2.2 million.Justin Sullivan/Getty ImagesDenny's plans to close 150 stores to boost annual unit volume sales amid declining sales.Chains that traditionally attract more families, like Red Lobster and Applebee's, are feeling the squeeze."Families have been hit hard by inflation and so are dining out less," one analyst told Business Insider.Denny's is the latest casualty of the squeeze on family dining chains, announcing this week that it plans to close about 150 locations before 2026.A Securities and Exchange filing from the chain Tuesday showed that around 50 stores will be shut this year, with an additional 100 closing in 2025.This represents roughly 10% of Denny's 1,586 stores overall.