At the end of the day a bachur that is sitting and learning top or not needs a chance to chill whether its a ciggarette or a beer that is what guys do. If it gets out of control i.e. Addicted to smoking, or constantly drinking high volumes then you can start having a conversation. As far as shiduchim is concerned-any girl in this day and age that will be concerned that the shiduch has a beer or two i wish her much hatzlacha because this is just what guys do.