Yoginis of the Williamsburg hinterlands may lack some of the material blessings of their Bedford Avenue brethren, but starting soon they won’t have to do without the spiritual and physical conveniences. Judging from the activity in the storefront of the architecturally-challenged building at 628 Metropolitan Avenue, a new yoga studio called Abhyasa will soon be joining other small business like Red Toe Nails boutique and Crest Hardware on this stretch of Metropolitan. As of this morning, Abhyasa’s opening date was not posted and the paper in the windows blocked any view of the interior. Anyone know when we’ll be able to start saluting the sun? GMAP