It's all about perceptions:
Talking to people is social behavior.
Sitting/standing quietly by yourself is anti-social behavior.
Meeting new people through personal introductions or common ground is social behavior.
Approaching all strangers like you're a stray dog looking for a home is suspicious, anti-social behavior.
Approaching chicks you dig and engaging in conversation is social behavior.
Surveying the room and going from HB to HB like a predator is downright shady, anti-social behavior.
The moral of the story: Whether alone, with a wing, or with a large group, exhibit social behavior. It's how to build trust, win friends, get laid, and make connections with other human beings.