Drunkard Advice to his son

Drunkard Advice to his son

The drunkard told his son at the BAR:
'My dear son, since drink is in the genes, you too will take to drinking; of that, there is no doubt. But, you should drink moderately like me and should know when to stop'

'How to know that, dad?'- Son asked.

'Er, well, look at that table at the corner. Three people are sitting and drinking. You should stop when they appear as six people. Double the actual number is the limit...Got it?'

'But dad,' said the son,' there’s only one man sitting there.'