I just stuck mine, enclosures and all, in a back room cut off from the rest of the house. Keeps them at 45-50 F day and night with the weather we have this time of year. Yes, there's still activity but not much.

60 really isn't cold enough for them to digest food efficiently, if at all and it isn't cold enough to keep them from dropping weight either. But if some of those snakes went off food anyway, the cooler temps should help slow weight loss. If they're losing significant weight then at some point you have to make a decision to bring them out or go colder. 60 really isn't the place to be if you can't digest and it's also not cold enough to stop weight loss.