If someone has an addictive personality, they will find an addiction to give them the brain boost they need. When the first Atlantic City casinos shifted to non smoking to try and attract the wealthier casual gamblers from NY, they nearly went bankrupt. Their bread and butter was the addicted gamblers, who would give back all their winnings and then some, rather than the people who would stop after a big win. The addicted gamblers were also usually addicted to cigarettes.