LAST SUMMER U2 played 3 sold out concerts in Boston over 4 days. On the 3rd day, a Monday, they took a break. Rumor started that they would play an impromptu concert at The Burren in Somerville. Secret Boston Tweeted the 'rumor' making it VERY CLEAR that it was a rumor. This lead to lots of conversation on Secret Boston private group page, where several members working in PR confirmed U2 would be there. At this point, at about 5pm on Monday, Secret Boston sent an email blast to all members about the RUMOR of U2 'possibly' being at The Burren that night.