Don't sleep on this Boston suburb.An aerial view of the Brookline neighborhood.Credit: Wangkun Jia/Adobe StockBrookline, MassachusettsStay at Iris Hotel, a boutique property that brings a clean, modern aesthetic to Brookline while keeping you close to both neighborhood spots and downtown Boston.Grab a table at Mahaniyom, a standout Thai spot known for its bold flavors and creative small plates.Spend an afternoon exploring Coolidge Corner, where …