For many of the clean-up day events Partnerships organizes, they also make sure to post wet paint signs, etc. Sending thank you notes, paying performers, adding new volunteers to your mailing list. In order to have a successful event it is important to publicize as much as possible. Most importantly, encourage your friends to publicize your event by word of mouth. You can also try for free ads on cable or radio and notify your mailing list.
Flyers also help attract new volunteers and raise the profile of a group.
The most popular way to publicize an event, other than by word of mouth, is to post flyers all over your neighborhood. Provide a contact number for people to call for more information or to volunteer to help out. Make copies you should be able to use connections to get free copies from a school or church, your City Council member, or your office. In the windows of and inside local stores, especially those near the park. Elementary schools, high schools, and colleges, both public and private.