As small as my washer is (stacking apartment “Thin Twin” unit), two bath towels are a load unto themselves. 
Maybe these are instructions if you have to use a laundromat?
Mine does too, although they really don’t have issues with people doing things like drying blue jeans by draping them over the balcony, or hanging a heavy terry cloth bathrobe on a hook like I have done. Their issue is more with people who hang things, and then leave them there (I used to have a neighbor - never found out who - who would do this with the washer and/or dryer: put a load in, and then leave it there for several days).
There was one neighbor who would hang clothes on a rolling rack, which they would place on the balcony for a few hours and roll it back in, and somebody else draped all of their clothes over their balcony. Another tenant turned them in, but I felt it was NOMB, on top of the not-unlikelihood that perhaps this household had to choose between machine-drying their clothing, or eating.
Maybe…I cannot find where I read that so I withdraw it. I would swear I read it somewhere but since I cannot find it I will not defend it. I’m probably misremembering.
That’s OK. Commercial washers and dryers really don’t work the same way that home units do.
i’m out of ideas, then. i’m just repeating what my daddy said. come to think of it, that was 35 years ago. maybe i better just shut up.
Wait, seven? With four pockets on a fitted sheet, at two clips per pocket, that would seem like eight is the way to go. How do you use the seven?