I use what ever I'm nearest too, honestly
a huge problem in my area is actually restrooms. apart from ones in cafes, and one in the mall, finding them is hard- and if you're not in the town, well.. you have a choice. smell the rest of the way there, or turn yourself around and get a change at home.
recently they had a carnival here with rides and stalls. not a single restroom in sight, not one
another thing they don't like here is if you enter the cafe for the simple purprose of using the restroom
they get funny about it and are like we're not a service station, and if everyone stopped here to use the toilet, we'd never get any food served