A conservatively dressed courier drives a company-leased Smart Car to an apartment on a weekday afternoon. Erick Alvaro hands over a white paper bag to his 58-year-old customer, who inspects the bag to ensure that everything he ordered over the phone is there. An eighth-ounce of organic marijuana buds for treating his seasonal allergies? Check. An eighth of a different pot strain for insomnia? Check. THC-infused lozenges and tea bags? Check and check, with a free herb-laced cookie thrown in as a thank-you gift.