Party in Nomansland

"No man's land is waste or unowned land or an uninhabited or desolate area that may be under dispute between parties who leave it unoccupied out of fear or uncertainty. The term was originally used to define a contested territory or a dumping ground for refuse between fiefdoms. In modern times, it is commonly associated with World War I to describe the area of land between two enemy trench systems, not controlled by either side. The term is also used metaphorically, to refer to an ambiguous, anomalous, or indefinite area, in regards to an application, situation, or jurisdiction. It has sometimes been used to name a specific place.'' (Wikipedia)

no-man's-land: a situation or area of activity where there are no rules, or that no one understands or controls because it belongs neither to one type nor another.
- The families of people who die in custody are in a legal no-man's-land when they try to discover what went wrong
- to be lost/stranded/stuck in no-man's-land (Cambridge Dictionary)

no-man's-land
1 
a: an area of unowned, unclaimed, or uninhabited land
b: an unoccupied area between opposing armies
c: an area not suitable or used for occupation or habitation
//downtown was a retailing no-man's-land

2
an anomalous, ambiguous, or indefinite area especially of operation, application, or jurisdiction
//the no-man's-land between art and science (Merriam-Webster)