When I first moved to Nashville I did some work with one of the security companies taht is very big in town here. They have very few "good" jobs and are mostly a joke, but in order to get the good jobs and to get in good with the owners, I worked the unwanted gay-club position a few times. I carried rubber gloves, and put them on before breaking up the one fight that took place while I was there. I didn't wear glasses, but I know that the one guard that worked that spot regularly did.
You should consider having a one-way CPR mask handy too. Gall's sells little pouch kits with disposable masks and rubber gloves. along with a few alcohol wipes.