Not sure why I didn't think of this until now but better late than never I suppose.
I have added a subforum to the Meetups and Events section. This section will be for leaving a review of any event you attended that was listed by a member. It is not for bashing anyone or any event but for giving an honest opinion and possible suggestions for changes to any upcoming events they may want to hold. Hopefully this will help promote better events and more attendance. I know a lot of people that won't attend an event until they have feedback from others about its security and general makeup.
Be sure and tag the event host so they can see any ideas you have to make their events better.