Based on the interactive model of identity formation (Postmes, Haslam, & Swaab, 2005) we investigate whether displays of coordinated actions foster feelings of solidarity. Participants were randomly assigned to roles of actors and observers in two experiments (N = 191 and 276). Actors performed in an “airband” in which all played air-guitar (enacting mechanical solidarity) or each member played different air-instruments (enacting organic solidarity). In the control condition actors imagined playing (Study 1) or performed individually (Study 2). As predicted, displays of solidarity led to elevated levels of experienced solidarity among actors and observers. As predicted, experiences of organic solidarity were mediated by having a sense o...