My club has access to multiple fields of different characteristics. The three I'm most familiar with are:
1) Davis Field - a public park we lease from the town it's in for the season with the understanding that it's a shared/mixed use public space. We have dog walkers, hikers, etc all use that space with us. In the Fall / Spring, there are youth Soccer leagues that use the field and that's the only time we can't fly. When we're there, there's a winch line area, a frequency board, and that's about it. No formal flight line. People walk out into the fields and launch electric or free flight planes where there's space. Those with multi rotors either do the same, or fly over an area next to the winch line if they want to avoid planes landing and taking off. It's sort of an informal setting. You don't have to be a club member to fly there, and many aren't.
2) There's another field in the next town over where we just negotiated with the town to fly out of, as a secondary field whenever there are soccer games at Davis. Same rules, but no winches setup there.
3) Bill Martin Field - this is a AMA field we share with another club (Millis Model Club) with a grass runway, fenced pilot stations / flight line, pit area with setup tables, equipment shed, locked gate, etc... Here, most people fly fuel powered fixed wing and helis. Basically, the same procedures are echoed by others. Helis and multirotors are treated similarly. Pilots announce intention, especially when walking out to the field. The rules are essentially:
* Announce all intentions -- hand launching, walking on field, dead sticks, general landings, low passes, etc.
* Rotary-wing aircraft and 3D aircraft can fly in the same airspace / at the same time with pattern aircraft, but pilots must pay attention to above announcements (e.g. for dead sticks, landings, etc) and must heed way to all dead-sticks and landing aircraft.
* No flying over pits and pilot stations.