Bike rental Nice

I have a business trip coming up to Nice and my flight schedule allows for an afternoon of riding. I arrive at 1pm at NCE airport and am meeting a client at 8pm, so I could go for a ride.

However it seems almost impossible to rent a bike for that time frame. Either the shops are closed during noon, or they are too far away / don’t deliver or, apparently, simply don’t want the business. Anyone have an idea or knows a local shop that could help me out?

Any help is greatly appreciated! and more specifically