Businesses in Cancún and Playa del Carmen report steep losses due to sargassum, with restaurants losing diners and beach clubs sending staff on unpaid leave. Restaurants and beach clubs along the shores of Puerto Juárez in Cancún and Playa del Carmen are grappling with a sharp downturn in business due to a relentless invasion of sargassum, a type of brown algae that continues to wash up on the coast in thick, pungent piles. In Puerto Juárez, dini…