I'm going to brooklyn and I need a car to get from place to place between talks. Can you recommend me a solution to this problem?

The options are not few. Especially when it comes to Brooklyn. You can take a cab. You can use public transportation. But as for me, the most correct solution would be to use a rental car. As a variant, you can try to choose a car at the link https://nyweekly.com/lifestyle/rent-a-rolls-royce-or-suv-in-nyc-from-drivos-new-brooklyn-location/ There is a good fleet of cars decent technical condition.