Nicaro is a nickel-industry town on the coast of Holguin province, and its small eastern Cuban airstrip was never built for scheduled passenger jet service in the first place, so no, Nicaro Airport (ICR) does not have a lounge of any kind. The airfield historically served utility and limited local flying rather than the kind of commercial timetable that would ever justify a premium waiting room of any real size or scale.
That airline-service picture is the real anchor here: Nicaro's air traffic has always centered on small aircraft and irregular movements tied to the town's industrial role rather than a fixed airline schedule with connecting banks of flights, the pattern that actually creates demand for a lounge anywhere in the world. Without that kind of scheduled volume, there has been no commercial case for the airport to add one, and none should be assumed to exist now or in the near future.
Holguin is the genuine pivot for travelers in this part of Cuba. Frank Pais International Airport at Holguin is the real regional gateway, handling the international charter and scheduled traffic that actually serves the province's tourist coast around Guardalavaca, and any realistic lounge, day-pass, or premium-service question for eastern Cuba belongs there rather than at Nicaro's small industrial strip.
If your plans somehow route through Nicaro itself, expect a bare-bones airside experience: minimal seating, no food service to rely on, and a boarding process built around a small aircraft rather than a scheduled airline queue. Direct any lounge or premium-access research toward Holguin, and confirm ground transport between the two points well ahead of travel, since Nicaro is genuinely not a hub anyone should plan a real connection through today, and local transport options between Nicaro and the wider Holguin province are limited outside the town itself.