What makes the South Beach branch of the Swedish mega-retailer especially notable is not its bright, cheerful three-floor premises (including a gargantuan video screen with what a friend of mine called “epilepsy-inducing” footage) or its appealing, fairly trendy merch at appealing prices, but the venue: the Lincoln Theater, built in classic Deco style in 1936 and for 20 years home to the New World Symphony.