Henges were important in the Stone age. They were places, often surrounded by a ditch or an elevation, often circular, often containing standing stones or mounds of stones, where the members of the community or tribe came together for a ritual or ceremony of some type. It would be arrogant to believe we do not function in the same way today. Probably football stadia or rock arenas are too large to consider as henges. You do not have enough knowledge of the other members of the group for complex kinship, although they are mostly motivated by the same ambitions (to see Man Utd win/to affirm their love of Oasis or Taylor Swift). The church altar would have been a henge but it has almost died out in this country for most people. Maybe the henge has become virtual. Facebook or WhatsApp groups. Often in a henge you may require a goat or maiden, for sacrificial purposes. The nature of on-line culture has retained this element. It could be one of the consistent features of the henge. Someone to absorb the necessary violence of the members.