There are two schools of thought when it comes to the girl-to-cock ratio for Blowjob Parties. One is that you want more cocks than girls, as seen in the thread above, and here:
http://www.facialforum.net/attachmen...4&d=1527253553 The girl really has to work hard and seeing her suck numerous cocks and swallow load after load is a fabulous thing. There is no upper limit to the number of cocks a good girl can service, though of course you may want to bear in mind the waiting times involved. One girl to ten cocks might be a practical upper limit.
The other way to look at it is that the guys would like the chance to get their cocks in more than one mouth ... enjoying ordering a new girl to take over ... then maybe another, and another: so this means more girls than cocks:
http://www.facialforum.net/attachmen...9&d=1563169121 The guys also get the pleasure of seeing the 'spare' girls on their knees, waiting obediently for their instructions.
http://www.facialforum.net/attachmen...8&d=1553296622 Try a ratio of 2-3 girls per cock if this takes your fancy.
NB There is, of course, no wrong way to have a Blowjob Party.