There’s a non municipal kind-of-nice but nothing special public course ($80-$120 greens fee, range balls and cart included) I went to where at the end of the round as I returned the cart a man wiped down my clubs and drove me and my clubs back to my car. I actually told him not to worry about it and preferred to not have him do any of it, but he just jumped into it automatically along with the friendly small talk.

What’s the expected bare minimum obligatory tip here?