Mazal, I thought that a bride and groom can’t drink on their wedding day. (Unless you meant that little sip at the chuppah.)
I don’t see social drinking among adults as a problem in general. People should know their limits. We can’t control everything. Of course adults should be responsible around teenagers and adults, especially on Purim and Simchat Torah when the spirits run free…but to ban drinks by a kiddush or parties is taking it too far.