In this article, we re-assess the relation between association membership and individuals' feelings about immigrants, thereby focusing on possible shifts in this relation in the wake of negative societal shocks (i.e. the 9/11 terrorist attacks). That is, do such events tighten or loosen the connection between association membership and immigrant-intolerance? Using repeated survey data from Flanders (Belgium), our results indicate that there is at best a weak overall connection between association membership and immigrant-intolerance. The exception lies with members of socially embedded (or 'connected') associations, which tend to be significantly more tolerant towards immigrants. Interestingly, we find no significant change in the relationship between voluntary association membership and immigrantintolerance in the immediate aftermath of 9/11. This suggests that negative societal shocks have little direct impact on the membership-attitudes relation. The analysis contributes to discussions on the potential 'bright' and 'dark' sides of civic engagement.