50-person wedding, mostly women, 6-hour reception: two standard units enough?

Two standard units are not enough for a 50-guest wedding reception lasting six hours with an open bar and a mostly female crowd. The industry guideline suggests starting with about one standard portable toilet per 50 to 75 people for a four-hour event. Your event is longer, includes alcohol, and has a demographic that typically uses restrooms more frequently. These factors increase the needed capacity. I would add a third unit to avoid long lines. A cluster of three units provides a better experience. If the event is open to the public or on public property, the ADA cluster rule requires at least one ADA-compliant portable toilet when multiple units are provided. Check with your rental company about local health department rules for special events. The cost to add a unit is driven by the rental rate for the duration and the delivery fee. Weekly service is standard, but for a single-day event, no additional service visit is needed unless the units fill prematurely.