You could probably turn it into an extended access point or something like that. You could also set it up to be used in like let’s say a lab or something like that. If possible, check what router it is and see if you can put OpenWrt or something like that on it.
If not, collecting dust in a box isn’t a bad idea either, just if you decide to take it out again to clean it thoroughly.
That has to be a Starbucks.