Are mall and restaurant stops ok?
How long are Uber drivers willing to wait if I asked?
The Guru Take
It depends on the drivers' schedule and how they are.
Uber’s recommendation for the riders is to keep each stop short in consideration for the drivers. The feature is meant to be used for quick errands, such as picking up other passengers or going through a drive-through. It is NOT for going for shopping and dining.
With that said, there is no formal rule from Uber, except for their request to keep the stops to 3~5 minutes.
You can always ask your driver if they are willing to accommodate a longer stop. Depending on their schedule and how busy they are, they may be happy to wait in the parking lot. Remember, they are paid (and you are charged) for the time they wait! (Albeit it being a small fee, at about $0.20 a minute in the USA.)
If the driver is not happy with it, don' fret. Simply request another ride when you are done with your errands. That's what the on-demand car service is for, right?
Lastly, what happens if you ask a driver to wait, but the driver decides to take off. (Say you were taking longer than you said you would.) In that case, the driver would simply end the ride, get paid for the time he or she drove you and waited.