Canada's federal government's task force on cannabis legalization recommended against selling alcohol and marijuana in the same locations, citing concerns "about product promotion and exposing a larger population to cannabis products should sales be co-located, as well as the impact on cannabis consumers who are trying to avoid alcohol."
From the task force's report:
- MINIMIZING HARMS OF USE
One of the central issues to consider in the design of a legal and regulatory framework for legal access to marijuana is to identify those system features that will best reduce the risks of health and social harms associated with use.
When considering how best to minimize harms associated with marijuana
use, it is helpful to consider the two different approaches taken in
controlling tobacco and alcohol use.
In the case of tobacco, the overall objective is to reduce or even eliminate use for all Canadians.
In contrast, the overall objective with respect to alcohol
is to promote responsible use amongst adults, and to prohibit use
amongst youth. These objectives are achieved largely through actions
such as setting a minimum age for purchase, educational tools aimed at
promoting responsible use, and taxation measures.
Given that the majority of harms related to marijuana use appear to occur in select high-risk users (e.g., youth) or in conjunction with high-risk use practices (e.g., frequent use; highly potent products; impaired driving), an approach that draws lessons from both tobacco and alcohol control should be examined. Both approaches rely on a comprehensive suite of actions aimed at those users at highest risk for harms through active prevention, education and treatment, as well as policy and legislative interventions.
Another relevant excerpt:
- DESIGNING AN APPROPRIATE DISTRIBUTION SYSTEM
For example, in recognition of the
more serious impairment that results when alcohol and marijuana use are combined, both
Washington and Colorado do not allow marijuana to be sold in stores that also sell alcohol.
In short, they want to discourage (or eliminate) tobacco usage, and hence don't want tobacco and marijuana sold in the same location, and they don't want alcohol and marijuana sold in the same location to discourage high-risk behaviors when combining them.
You can read the full report here: https://www.canada.ca/content/dam/hc-sc/healthy-canadians/migration/health-system-systeme-sante/consultations/legalization-marijuana-legalisation/alt/legalization-marijuana-legalisation-eng.pdf