Is smoking pot more wrong than drinking alcohol?
That said, alcohol is not particularly innocent.
Bottom line, I have seen pot and alcohol damage the careers, fortunes, and futures of many, but in different ways.
BTW, if you smoke a joint at night, you still be slightly mentally impaired the next day. Your memory won't be quite as good as usual and your motivation will be reduced. Coffee might help but you are still impaired.
A couple of beers will have basically no effect.