Commonplace in many walks of life whether or not you like it.
I'd be interested in seeing some options on this too.
I use a backpack at work, both for work stuff and for carrying gym stuff around. I am not sure, from a practical standpoint, that anything other than a backpack could work for me. I could see a duffle bag for gym stuff but I question the comfort.
I think a rucksack style backpack could work for me.