The Old King's Arms was a tavern in the Strand, London, which was noted for hosting a masonic lodge which was linked to the Grand Lodge. In the 1730s it was renowned as an Enlightenment Lodge, but subsequently evolved more into a dining club.
Masonic Lodge
Lord John Ward, an avid Freemason, joined the Lodge in 1744. He had become Grand Master in 1742.
References
Old King's Arms Wikipedia(Text) CC BY-SA