In this Sept. 11, 2017, photo, smoke pours out of a pipe that uses a hot metal "nail to vaporize concentrated marijuana which is inhaled by a user in a process called "dabbing" in Washington, at a closed Ethiopian restaurant at a "gifted" marijuana event. In the so-called District of Cannabis its legal to grow and consume marijuana, but illegal to buy or sell it. The result of this unique legal grey area has spawned a thriving cottage industry of businesses using the gifting loophole. So far the city government and police are letting it happen. (AP Photo/P. Solomon Banda)