I had a single living studio dorm in college with epoxy floors for the kitchen and bathroom area. I used my sink and shower as urinals constantly and given the durable floor I had no worries about missing. I would often challenge the distance while either standing or sitting on the toilet and aiming for the shower. Sometimes I made it and sometimes I made a mess on the floor.
I had similar, except I had carpet near my bed and desk so I didn’t go there. The kitchen and bathroom were all epoxy floor though, I used to see if I could piss into the shower from the toilet. It depended on the day but sometimes I could.