Gathering everyone at the lanes on a Tuesday afternoon is the smart move. It is low-key, fun, and costs much less than a Friday night. You will want to lock in the lanes and the snack platters about a month out to make sure the group stays together. Leading with a plan means you aren't scrambling for cash the week before the party.
Splitting a $600 bill between a dozen people is a headache you don't need. It is easier to cover the cost yourself and use a long timeline to pay it back. You get the event sorted now and give yourself a year and a half to settle the tab without stress.
This 0% window is a firm deadline, not free money. If you still have a balance after those 18 months, the interest rate will jump to the standard high rate. Make sure the bill is gone before the intro period ends.