Sundance Cinemas — part of Robert Redford's Sundance Group — hired investment bank Salem Partners in June to find a buyer. And today it has one: Carmike agreed to pay $36 million for Sundance’s 37 screens at five theaters in West Hollywood, San Francisco, Houston, Seattle and Madison, WI. When the deal closes, Carmike will have 274 theaters with 2,909 screens — closing in on its goal of 300 and 3,000. Carmike says the deal will add $24 million to its annual…