The co-stars will be recognizable from television, but you’ll have to trust them on plots of ‘2 Square’

Hy Bender

John Lutz is over the supine Peter Grosz in a “4 Square” performance going back to 2010.

One is most likely recognizable for sitting in the driver’s seat at a Sonic Drive-In. The other was told to “shut up” by Tina Fey so many times over the run of the sitcom “30 Rock” that it became his Instagram handle. Together, Peter Grosz (“Veep,” “Wait Wait … Don’t Tell Me!” and those “two guys” fast food commercials) and John Lutz (“Mapleworth Murders,” “Late Night with Seth Meyers”) are two of the most talented improvisers working. Their long-form collaborative show “2 Square” – the more compact, traveling version of the long-running “4 Square,” which they’ve performed going back more than a decade in Chicago with Rob Janas and Dan Bakkedahl – is character-rich, absurd, self-referential