The time allotted so people can vote is taken out of business hours. That doesn't mean there is a polling station in the cafeteria. It troubles me to hear you say that. It would already be a lot to put the machine there. You don't walk around with ballot boxes. However, it remains to be seen how we go about making this secure before the vote takes place.
France has electronic voting, for example. However, they also have normal voting, like what we have today. It's a mix of the two, and the individual can choose one of the two ways of voting.