Anyone can go into a dispensary and buy weed. As tourists, we were not once asked for any sort of identification in any of the many dispensaries we walked into. We were able to buy by the gram, topicals, and gummies. Several shops were even open until 2 or 4AM. Technically speaking, the law says that only adults aged 20 and up are allowed to buy cannabis in dispensaries, but not a single one asked for an ID.