The Grolier Poetry Book Shop in Harvard Square turns 85 this year, and it needs a little help from its friends. Owner Ifeanyi Menkiti puts it kindly, “Sales are not very robust.” Fans of the Grolier are invited to two fund-raisersp: At 7 p.m. on Wednesday Jim Vrabel will perform a dramatization of John Berryman’s “The Dream Songs” and Sunday May 20 at 3:30 p.m., “Laughter at the Grolier,” a light-hearted reading, will take place at Bloc 11 in Somerville.