This has become a tremendous problem. The competition as to who has the better single malt, who can drink more etc. is rampant.
The other issue that has been addressed in the past, but seems to have been swept under the rug, is the popularity of the kiddush club. In some shuls, this has become the main reason to come to shul shabbos mornings. And the children that witness this can only grow up thinking that this is the norm.
Shuls need to place a stop to the kiddush club and, as someone else said, perhaps a stop to all drinking in the shul period.