Parks and Recreation ’s Ben and Leslie are about to rub elbows with some real power players. (No offense, Ron Swanson.)

As we first told you a few weeks ago, some of the NBC comedy’s forthcoming fifth season will take place in Washington, D.C. We can now add that U.S. Senators Barbara Boxer (California), John McCain (Arizona) and Olympia Snowe (Maine) will play themselves when they appear at a D.C. cocktail party attended by Ben (Adam Scott) and Leslie (Amy Poehler).

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In a twist at the end of Parks’ Season 4, political strategist Ben accepted a position with a national campaign – a career boost for him but a possible sticking point in his and Leslie’s love story.

While we can’t see Ms. Knope packing it up and leaving Pawnee for good, our original intel was that Ben’s Washington stint might last a while – and as such, the show planned to go on location to shoot footage that could be used in the Sept. 20 opener and beyond. The D.C.-shot, senator-stuffed episode is slated to air Sept. 27; who knows what other Beltway bounty Ben’s new gig will bring?