Sitcom vet Ira Ungerleider has signed on to serve as showrunner and exec producer of the NBC midseason laffer “Friends with Benefits,” from 20th Century Fox TV and Imagine TV.As part of the deal Ungerleider has also cut a blind script deal with 20th. “Friends” revolves around a group of twentysomething singles trying to navigate the dating world. It hails from “500 Day of Summer” scribes Scott Neustadter and Michael H. Weber and “Wedding Crashers” helmer David Dobkin. Also exec producing are Jeff Kleeman, David Nevins and Brian Grazer. Ungerleider’s laffer credits include “Friends,” “Ladies Man” and most recently, “How I Met Your Mother” and “Gary Unmarried.” He’s repped by UTA.