Amtrak has convention discounts for groups of 20 or more

https://amtrak.com/mt/www.amtrak.com/group-convention-travelers-discount

Let's get train cars full of Berners converging on Philly before the convention. Time on the train can be spent strategizing for the convention and protests. Time can also be spent spreading Bernie's message on social media and YouTube. As a bonus we can promote Bernie's infrastructure plans and high-speed rail because riding the train across the country is slow. It's really fun if you're with friends and family and like seeing America but it takes forever.

https://www.reddit.com/r/SandersForPresident/comments/4kh1wm/amtrak_has_convention_discounts_for_groups_of_20/