Stand-up comics typically play colleges as part of a circuit deal — and because it pays up-and-comers well in a business where you can’t live off free exposure. But Colorado State University clearly ponied up for its latest entertainer, given that the last time she played Denver she sold out the Paramount Theatre. Comedian and actor Tiffany Haddish will headline CSU’s Ramfest on April 11 with a 6 p.m.