Its bad enough getting you guys and gals to spell properly, let alone give you more words, but it appears that slowtwitch is in fact a sodality:
“nonresidential groups that cut across kinship ties and thus promote broader social solidarity; or a group organizing people of similar interests or occupations. It’s common in tribal societies – that is, societies without any overarching or centralized government to run things. Sodalities link people across the social boundaries of kinship and village and so can be important in getting things done – fighting wars, negotiating settlements, repairing tracks and roads, and so on. A type of sodality is age grades. Usually men, but sometimes women, belonged to these organizations for socializing purposes, charity work, or to ensure proper completion of a task.”