Hey I feel left out...I didn't get a PM!!
Here's my take on the answers...a)
I've overheard Em tell guys on phone that the 4-6pm parties are the least attended, but it is very much pot luck. I've seen parties ranging from 6 to 16 guys (with 8 girls) and I generally attend weekdays 1-3pm.
You really don't want a low attendance party (7 guys or less) as the girls have way more energy/stamina than the guys, it usually ends in slaughter as the guys take longer and longer breaks and the girls come 'hunting' for you...be careful what you wish for!!
Somewhere around 10-12 guys gives a really good mix of MMF at the start, wall-to-wall 1-2-1s through the middle as guys take breaks to reload, then multiple girls on you at the end if you happen to be the 'last guy standing'.
Full attendance is not the norm, there's often a no-show or a guy running late, or a guy leaving early, but even with 14 guys you can have great fun, a lot of sharing at the start, some 1-2-1 time with a bit of banter and sharing here and there, it's great to see how the greedy girls love a cock at each end, then there's often a big orgy at the end as everyone left standing moves into one room for the final push!b)
Ask the girl where she wants you to cum, usually tits/body, occasionally mouth and of course in her pussy with a condom.c)
The girls are pretty good at using the wipes and shower as necessary so that hygiene isn't a problem. Your level of squeamishness will determine what you do as regards RO, you generally relax more about this as you attend more parties. Of course if you punt 1-2-1, the girl may have just had a quick 'whore's wash' before you arrive, just that you likely didn't see the previous punter and what he did to her, but the same result.d)
The action is very fluid, you have to be ready to share, you won't be allowed to hog one girl for the whole party, esp if others want to join. If you want to see all 7 girls in 2 hrs...work it out...you have approx. 17 mins with each one without allowing for any breaks. There's no shame in moving on even if you haven't popped.e)
Girls use the wipes or take a shower to clean up after each partner, including nipples that have been licked.
Hope that helps!!