BOSTON — Worcester hotels are hiring, again, and preparing for a busy summer season as vaccine distribution boosts confidence in travel, according to industry professionals. After the pandemic wreaked economic havoc on the hospitality industry and forced deep layoffs last year, Worcester hotel managers said leisure travel is picking up as vaccinated residents feel comfortable to leave their homes, again. “It’s amazing to see how quickly Worcester has come back,” said Mary Simone, general manager of the AC Hotels Marriott in downtown Worcester. “The light at the end of the tunnel is ...