We have been doing this for quite a while (so long I can't remember when I made the switch). The "University" division is open to any current student, faculty or staff meeting regardless of...well anything. Most sports have two divisions - "A" and "B". Occasionally there is a "C" (basketball and flag football), and a few of the smaller sports only have one. They self select, though occasionally we will boot a team up a division if sandbagging is indicated. We also offer a women's division in all sports and a co-rec division in most. Incentive for the co-rec division is it is the only legal way to play for two teams (one in any of the other divisions and one in co-rec). The transition was fairly easy. The most noise came from fraternities because at the time the main impetus for the change was actually to eliminate the old affiliation classifications (fraternity, residence hall and independent in the then Men's division, Sorority and open in the women's) and base the structure on level of play. They got over it.