A large group like this should honestly be split into somewhat of a similar handicap rating. I don't have one, but have an idea..
I don't need to be hacking away with a 5 or 9 handicap, when I should be alone with my 16 or 18 HC.
Or we could just play a scramble, takes the pressure off those of us who aren't all that good yet & it doesn't turn into a dick swinging contest.