A popular restaurant known for its simple menu of burgers and fries will soon be open in Bangor. The first day of business for Five Guys Burgers and Fries is Monday, March 18th.The sign on the door says they’ll open at 11 a.m. The new restaurant is on Stillwater Avenue, in the same area as the Wal-mart Supercenter. It’ll be the second Five Guys in Maine. The other one’s in Portland.