Go to Amazon and look for a distressed leather or canvas messenger bag. OK, yes, a "man purse" so to speak except there's nothing feminine about a messenger bag. If Indiana Jones and Jack Bauer can carry one, so can I. Nobody's going to mistake it for a girly purse.
It's quite practical these days for those of us who carry around a tablet or netbook, iPhone, charger, adaptors, etc. in this modern world we now live in.