I second this. I've messed up three pairs of suede and light coloured leather shoes before I learned the lesson that you should stick to beaters when going out for drinks (at least if the bar might be the least bit dive-y).
My best guess is that you're vegan, right?
Well, there are alternatives as stated above. The best one are of course the organic ones. There are many cotton and linen qualities that could actually work quite great for F/W use as well (cotton flannel to name one).