What to do in a hotel with seventy kids?

see, im one of those kids were at a hotel for a wedding in canada the whole hotel is family so the noise doesnt matter:) but theres seventy kids and were all bored theres no pool in this hotel and we cant go anywhere since it's 8:30 all the parents are at the wedding reception we coulod not go:( we are all bored please give ideas age range is 3 to 20 thank you