In an effort to be part of a growing trend of organized "Human Be-In's", local musical groups including Blues X Five and The Lost Souls produced the event without permits and/or permission. The found an electrical souce close to a picnic area, plugged in and played causing an uproar with the establishment. This was finally addressed a few weeks later when the Mayor and council gave in to public support/pressure and allowed the city's and Canada's first "official" Love-In at the Cameron bandshell.
For physical events that happen at a specific time. For example a concert, or dance performance. If there are multiple shows, you can still duplicate your event to cover them all.