According to an article in Wicked Local Cambridge, the Porter Square Hotel is hoping to open on May 1 in the space on Mass. Ave. where Kaya Restaurant had been, and it will include a steakhouse that will probably not open until several months after the debut of the hotel. The post says that the dining spot will honor the historic Porter's Hotel, which Zachariah Porter opened in the late 1800s and whose name is where both "Porter Square" and the "porterhouse steak" originate (cattle yards were once found around the Porter Square area).
No name has been given for the steakhouse as of yet, nor is it known exactly when it will open; as soon as we find out more, we will post an update here.
The address for the Porter Square Hotel and the steakhouse will be 1924 Massachusetts Avenue, Cambridge, MA, 02140.
[July 27 update: Eater Boston states that the new restaurant within the Porter Square Hotel will be called the Porter House Grill, and that it plans to open this fall.]
[September 14 update: Cambridge Day mentions that the Porter Square Hotel may be opening sometime in the middle of October, though it appears unlikely that the Porter House Grill will open at that time. It looks like the restaurant could be opening soon after the opening of the hotel, but a license to serve food/alcohol has not been requested as of yet, so it is not known exactly when the dining spot might open.]
[January 6, 2017 update: A License Commission General Hearing page indicates that Porter House Grill will open as soon as it hires a chef.]
[Earlier Article]
Kaya Restaurant in Cambridge Has Closed; May Be Replaced by Hotel with Same Name
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[A related post from our sister site (Boston's Hidden Restaurants): List of Restaurant Closings and Openings in the Boston Area]