The possession and use of marijuana by persons who are at least 21 years old is now legal in New York, as is the sale of marijuana and other cannabis products by New York State licensed dispensaries. However, a number of our cooperative and condominium clients have asked whether they may ban the smoking of marijuana in their buildings, either because they find it bothersome or because they are concerned about the adverse health effects associated with second hand smoke.   Read the article………………………..