From their event page:

Always wanted to try rowing but never knew how? Join Fairmount Park Conservancy and Philadelphia City Rowing for an Intro to Rowing class along the Schuylkill River on Saturday, September 6.

Connect with others in a beautiful setting and learn basic rowing techniques in a fun and easy-to-understand way. There will be two 2.5-hour timeslots (12-2:30 PM and 2:30-5 PM). Please only register for one timeslot so that we are able to maximize the number of people able to participate. Attendees should plan to be there at the start of their time slot as to not miss important information.

Participants must be 11 or older, and minors must be accompanied by an adult. This is a special one-time event with limited space. Please only register if you plan to attend! No-shows and last-minute cancellations take away tickets from others so we ask that you please be mindful of this before registering.