Is the tour starting off early on Friday morning? If so, approximately what time?
The group is large. How about taking the subway around so we can all gab and get whisked around.....this is friggen' NYC after all. Jeez

Saturday is out for me, but Friday is not.
Am working on this as I type.
FWIW, my own opinion is that when I hear "old-school NY pizza", that only means NY-Neapolitan style pizza, which is usually, but not exclusively, coal oven pizza. Not all coal oven pizza is good (IMO only Totonno's and Patsy's are worth a trip). Not to pizza anyone off, but 99% of the NY-Style pizza I have ever eaten (a lot) is really just not that good.
Chau, are you mostly concerned with only the pizza itself, or desiring to experience the atmosphere of places some would consider to be must-do pizzerias/atmosphere type joints?
Best --K