I have been to weddings where, during the recitation of the seventh bracha under the chuppah, the congregation sings "asher bara...". Sometimes it is along with the one reciting the bracha and other ...
ונוהגין להפטיר בחתונה שוש אשיש. The Rama above (from OC 428) says that in his area the custom was to read a special haftora if a groom was present in the synagogue. Has anyone seen this ...