Status Updates From Before We Forget Kindness (...

Okay, so my previous question has just been answered. You can travel to the future at both Funiculi Funicula and La Donna Donna.

An interesting additional detail: you can add cream to the time-travel coffee without impacting its temperature (and thus your amount of time in the past).

"In this world, there are countless situations where sound reasoning doesn't necessarily lead to the right answer."

One of the previous books mentioned Cafe Donna Donna, and told the story of a woman who traveled to the future. It explained why this was rare and it made sense. But no one has ever traveled to the future from Cafe Funiculi Funicula, and it's described as a place where you can go back (but not forward) in time. I wonder if Cafe Donna Donna is unique in this regard.