https://www.singaporeair.com/en_UK/u...unges/partner/
Newark Liberty International Airport
Location Virgin Clubhouse
Terminal B, after security checks
Facilities
Food Selection
Restrooms
Shower
Wireless Internet
TV
Baggage storage area
since you are flying *A business, you could access United Polaris in Terminal C (need to clear security separately, no bus airside between the two), as well as other *alliance lounges (Air canada Maple @ A, Lufthansa and SAS @ B). your boarding pass gives you access to any terminal at EWR
https://www.staralliance.com/en/lounge-finder