What situation could you possibly be in where a six pack would be sufficient?
1. Going home to drink alone? Really? So your gonna have six beers one night for the rest of your life then never drink again? What about next Friday? Or tomorrow? Get the twelver. its cheaper and shows foresight.
2. Going to a friends house where there will be five others and you all only want one beer? Might as well rent some gay porn on the way and save one of your buddies a trip.
3. You're selfish and you like to show up at parties with a sixer of some eclectic brew then drink everyone elses beer? gfy
4. Going to a friends house who won't be there and you need to pregame for an hour before being picked up and takin to a bar but you can't leave any beers cause they are 4 years sober? Bingo.
Considering the amount of times this is likely to happen i think its ok to stop selling them.
Also, if an order of fries at your typical fast food outlet contained between 4 and 6 fries the standard ketchup packet would be perfect. This is not the case. Have you ever needed just one? Can't you make em a little bigger? Every time i get a large fry and they only put 3 packets in the bag i feel like i am being punished.