[ghaff]

Then there are a fair number of cases where reasonable people disagree. Maid at hotel, others at hotels/parking attendants/etc., Uber/Lyft, the subject of this article, limo driver, bartender (in a bar or at an event), and so forth. You can tip in all those situations but I'd argue it's not the strong expectation that tipping at a sit-down restaurant is.

[behringer]

If you don't tip your bartender you won't get drinks very long!