I have a business trip to Jakarta next week and I am dreading the traffic reports I see online. Is it realistic to rent a bike there to get around the city faster between meetings?

This is actually the only way to stay on schedule in this city, as cars are stuck in traffic jams for hours. You need something maneuverable to weave between lanes. I usually recommend checking online platforms to see what's available near your hotel. You can check the current prices for motorcycle rentals in Jakarta, for example, here https://getrentacar.com/en-US/motorcycle-rental/indonesia-jakarta . This is much more efficient than trying to find a local shop on foot after arriving at the airport.

Totally agree. Just be ready for the heat and keep your helmet buckled. Riding there is an experience, but it definitely saves you half the travel time.