1) Alliances at work 2) Certain contract negotiators 3) Coalitions 4) Credit and student 5) Credit groups 6) Dues recipients 7) Federations 8) Groups acting in unison 9) Huge voting blocs, nowadays 10) Labor Day groups 11) Labor forces 12) Labor groups 13) Labor parties 14) Leagues 15) Local groups 1) Blocs 2) Organised labour 
Unions and associations can be useful sources of information and advice for members.