A British idiom might be "We're not going for beer and sandwiches."
Harold Wilson, when he was prime minister, actually invited union leaders to Number Ten to discuss the Winter of Discontent in the mid-Seventies, famously offering beer and sandwiches to fuel the negotiations.
The phrase resonated at the time and has a surprising longevity. It's cropped up again since:
BBC News 3 September 2003
It's a great headline for the Tories - the bad old days of union barons sharing beer and sandwiches with the prime minister in Downing Street are back.
BBC News 5 August 2015
Tube strike: no beer and sandwiches
With London's Tube network set for a 24-hour shutdown for the second time in a month, critics say Boris Johnson should be building bridges with the unions - but the days of resolving disputes while enjoying light refreshments appear to be over.
We are not in a time of beer and sandwiches. This is not the 1970s, when union barons and politicians shared snacks and hard talk at Number 10.