Further research reveals that the Goths are always with us, but honoured more in the breach than in the observance.
The third group are called 'Grebs' in the schools in my area. 'Grebos' by their enemies. Grebs may be identified by being unkempt and gloomy and reading books. You know the type.
These terms ring bells with you? Or are there different ones in use in your area?