For hours? No way. I wouldn't do that, even if I sometimes leave stuff for a few minutes if I'm in a cafeteria I know well, plus etc. etc. But not for hours. At

For hours? No way. I wouldn't do that, even if I sometimes leave stuff for a few minutes if I'm in a cafeteria I know well, plus etc. etc. But not for hours. At best your stuff would be taken care of by e.g. the cafeteria personnel, if not then with that much time the statistics won't be in your favour.