How do I ask this guy to hang out?

A few years ago, I worked at a Walgreen’s near my house for the summer and haven’t worked there since. Because it is so close, I go there a fair amount. There is a guy still working there, not much older than I am, who I always got along with when I was working there and who I still get along with. Whenever I go in, we have pleasant conversations but they always have to be short because he’s working and I have to leave. My question is how do I ask him to hang out without making it seem as if I am romantically interested? Right now, we have no way of getting in contact with each other aside from when I go into Walgreen’s and he happens to be there.