100-person corporate picnic with a beer tent: how many porta potties?
I'm planning a 100-guest corporate picnic on a Saturday from 11am to 4pm. We have catered lunch and an open beer tent for three hours. The site is a flat grassy field with easy truck access. I'm debating between two standard units or adding a third. I know alcohol means more restroom use, and I want to avoid lines. Should I stick with two units for a half-day event, or is the beer tent enough reason to go for three? Also, do I need an ADA-compliant unit for a group this size?