Can You Leave A Wedding While the Chosson and Kalla Are Busy Taking Pictures?
The gemara in Brachos (6b) says that "Kol Neheneh MiSeudas Chosson V'Einoy Misamchoy Oiveir BChamisha Kolos"; whoever enjoys from a wedding meal without making the Chosson happy cheapens five brachos that Hashem gave Bnei Yisroel using the word "Kol". What happens if after the Chupah the Chosson and Kalla are taking a very long time before coming to the main ballroom and you need to leave? Is it enough that you made the parents of the young couple happy?
The Shevet HaKehosi (5:230) says that while the chiyuv is specifically to make the Chosson happy and not the parents if you ate from the seudah before the young couple arrived in the hall there is no issur. The problem only arises if you eat while the Chosson and Kalla are present in the room where you are eating.
With regard to what is called making the Chosson happy, he says, that saying Mazal Tov is enough to earn your meal.
Disclaimer: We try to convey the Tshuva to the best of our ability. We admit that our understanding may not be accurate. Please also understand that this Tshuva may not be the final word on this topic. One should consult a Rav before drawing any conclusions.