Do you want a laugh every 30 seconds? Then you’ve got to see The Keegan Theatre’s production of Neil Simon’s “Laughter on the 23rd Floor.” Playing at the Church Street Theatre in the District one gets a pretty good idea of what it was like in 1953 for the writers of the NBC “Show of Shows,” starring Sid Caesar. The real names are not used and instead the writers in this story are working for the Max Prince Show. Ray Ficca plays Max Prince (or is it Caesar) to the hilt as do the other writers. Keegan regular Michael Innocenti is an absolute riot as Ira Stone, the hypochondriac jokester. There are seven other talents who play their roles wonderfully in this nuthouse. Wish I had time to name them all. Great direction job by Colin Smith. Do not miss this show!!