The full 1977 movie "Toga Party" (also called "Pelvis") was just released on YouTube.

https://www.youtube.com/watch?v=JnEz1PQIWqM

It contains a decent pie fight between Cindy Tree (on the left) and Mary Jenifer Mitchell (on the right).
The fight starts at 1:17:15.

There is also a scene, at 1:22:21, in which Bobby Astyr gets a pie dropped in his face.

Nice! That was sudden. So the nun DOES get pied, as someone had said on here recently. It's poorly shot, though. I loved seeing the scene in context. Admittedly haven't watched all of this yet, but I have watched is not without its charms.

Checking IMDB, no recognizable names. I love how the YouTube version starts with the FBI warning about piracy!

Love when they pie themselves at the end

Love this scene and this version seems to be in better video quality (still not great) than the clips floating out there. I think the actresses are Cindy Tree and Mary Mitchell.

The ebony actress playing the woman (a prostitute) dressed as a nun doesn't seem to be credited, sadly.

The irony.

Shame the glossy blonde in the red dress didn't get a pie.

the pie fight hits almost all my buttons: Two attractive women hitting each other with pies, reaction time after the hits. Its a shame the quality of the YouTube clip is so poor. I just did a search on my online apps and couldn't find the film under either name.

I vaguely recall seeing it and similar soft-porn films with slapstick scenes in the late 1970s, before we could record programs. I don't think they even qualified as "B movies" just something to fill up early cable channel time.

"Before recording," "cable channels." Damn I'm ancient!