Well theres Mac connector, which is faculties getting together to get to know people as a sort of social thing and photo op with most of your future colleges... not sure if its mac pass only, but you don't get your faculty shirt without it, so you might look out of place..
Not Macpass: I recall you being able to buy your way into charity casino and a band or two, (basing this off the events on
this site). The concert on the 6th you can pay for.. IRIS (theater thingy) is free I think... faculty day is 'free'(?).. GEK (engineer faculty night) you have to pay for a bus ride I think (not covered by macpass(?), clubsfest, sidewalk sale
Macpass(?):MacQuest and taste of mcmaster is probably a macpass thing, First year concert is usually exclusively for first years (?), faculty fusion, football game, etc
I never did welcome week in my year, and its a bit different this year, so don't take my word on any of this
p.s. buy the macpass to support welcome week.. the people help setting up, planning, or running these things have to be paid, ya know? (i.e. me)