We have been having this problem too. What has seemed to work better is having a designated volunteer night with a bunch of task set aside for them. There is always so much to do around the shop that we can’t get done on a regular basis- simple as sweeping the shop and courtyard, cleaning and restocking the back room, restocking and documenting new tubes/what we need more of.  These are great for the people who don’t know much about bikes but want to help.<div dir="auto"><br></div><div dir="auto"> Another option is sorting through parts/putting away donations. Are all of the tires hanging up actually good? How about the many wheels hanging up? For the more experienced volunteer they can strip bikes for parts/true wheels and things like that. This is much easier to handle with a designated volunteer event than on a day when your open to the public and have to navigate more. Hope this helps,</div><div dir="auto"><br></div><div dir="auto">Best,</div><div dir="auto">The Bike Church</div>