Serve Robotics is trying to get as many businesses as possible to use its cooler-shaped delivery robots — even if it means teaming up with an apparent rival. The autonomous delivery company's latest partner is DoorDash, which is also developing its own delivery robots. On Thursday, the companies said Serve's robots would start making deliveries for DoorDash in Los Angeles, a city where Serve already works with Uber Eats.Ultimately, the goal is to roll out the partnership across the US, the companies said. ...