There's absolutely no way this is the right place to ask this unbelievably dumb fucking question, but I figure whoever the fuck hangs out on the math board on 4chan can't not be smarter than me

What's the best way to gather this kind of information? I run a game for a group of people and they want our sessions to go longer. Awesome! But people are indecisive about how exactly they'd like it to be longer and while I type up a big-ass message about it (basically just listing all the different potential timings for them to pick from) I thought there surely can't be no chance I'm not unretarded for doing it this way