So Im thinking of starting a hoop jam in my area within the next month.  Its going to be very casual and meet up once a week on Sundays at a random park in the city.  I am going to print off a few flyers and stick them in some coffee shops and such around town.  There will be an email address to email if interested so that the spot wont be posted for all eyes to see.  When I email back potentials I will stress that it is just a meetup, not a class or anything, and that anybody is welcome (under 16 needs an adult accompany- just so I dont have a bunch of rugrats running around).  It will also be stressed that participating is at your own risk and coming to the event is an agreement of this.  Do I really need to print up waivers?  Im thinking of bringing a little table and chair so that I can have a mini booth set up for a clipboard with an email sign up and also so I can have a place to stick a sign that will say something like "Wasilla Hoop Jam" and under it like "Play at Your Own Risk."  Will this be sufficient?  I ask this because I dont want to turn people off with a waiver, but I also think if we are out in the park random people will just show up.  Any thoughts?