By Martha Bebinger
Mark Mack, 36, walks down a row of metal bunk beds, each stripped to a white sheet and a single, folded blanket.
“My feelings are all over the place. I’m over the moon,” Mack says, shaking his head in wonder. “It’s unbelievable, just unbelievable that, OK, I won’t be returning here to lay down tonight.”
Mack has slept almost every night of the last two years in this men’s dorm run by Pine Street Inn. Today is a milestone for Mack and the iconic institution that has been a roof of last resort for people in Boston for more than 40 years.