Tetra Lounge, one of Denver’s first cannabis-friendly smoking lounges, is preparing to reopen this summer after closing temporarily more than a year ago. Owner Dewayne Benjamin retooled the concept slightly, transforming an outdoor patio into the primary marijuana smoking area as he works to upgrade the business’ indoor ventilation system. Think of it like a beer garden, but instead of drinking alcohol, guests smoke weed. Benjamin expects to begin welcoming tokers back to his spot at 3039 Walnut St.