Stoners these days aren’t only smoking joints in cars like in “Dazed and Confused,” though that habit certainly hasn’t disappeared. Now, it’s increasingly popular to enjoy cannabis-infused beverages, which include seltzers, teas, lemonades and mocktails with varying blends of THC and CBD depending on the desired vibe (social, relaxation, sleep, focus). Cannabis gummies are all the rage for young people, offered in fun colors and flavors reminiscent of Sour Patch Kids. Gwyneth Paltrow, Seth Rogen, Mike Tyson and other celebrities have invested in products or launched their own. Some fitness gurus promote microdosing to enhance the workout experience. But advocates...