Have a marijuanaThis illustration, which ran in the Washington Post, combines two scenes that the artist saw: a man smoking a joint at a Keith Haring opening on Houston St. and a street scene near Times Square. (Illustration by Harry Pincus) Have a marijuana March 31, 2021 BY HARRY PINCUS | They say the world will not end with a bang, but with a whimper, and so the great day is cometh,…