Some fascinating details... The bathroom: you need good aim. The kitchen: lots of hermetically sealed packages. This was interesting:
"Salt and pepper are available but only in a liquid form. This is because astronauts can't sprinkle salt and pepper on their food in space. The salt and pepper would simply float away. There is a danger they could clog air vents, contaminate equipment or get stuck in an astronaut's eyes, mouth or nose."The exercise equipment is not fastened securely so as not to transfer load through structure, which would eventually need to be reacted by ... devices, probably jets? ... used to keep the station in place. An energy conservation decision. So, as you pedal (you don't need a seat, in fact she didn't sit down for 125 days!) the whole cycle moves also.
- NASA: Space Food
You have to not be bothered by tight places.