_On the Waterfront_ has a wedding scene in a bar that is significant of the
attitudes of marriage and the nuclear family.  The interesting (great!) thing
is that it is taking place in a bar.
                >Bill
ps>>> Are you looking for weddings, per se, or simply representations of
        married people, i.e. the power struggle between James Dean's parents
        in _Rebel_ or the rep of the Beavers parents?