This is, indeed, very sad news for the people of Miles City. I always considered the 600 Cafe to be the beating heart of downtown Miles City. Folks gathered, saw friends, talked, drank coffee and ate good, hearty, down-home cooked meals. I've never known any other restaurant (ever) to have an annual free Christmas dinner for all its patrons -- rich or poor. I have many happy memories of the 600 Cafe and all the colorful people who either worked there, or came there to eat. Definitely the end of an era.
Good luck to Butch and Gloria Grenz in their retirement and thanks for the memories!