Check with local town halls.. but I opt for the open house idea. You really can visit with more people that way, as they do not all come at the same time. We do this for our parties all the time, and we serve a buffet style foods that we can keep warm in crock pots, nesco cookers, nesco cookers made into ice bowls for cold items, make huge cubes of ice using old milk jugs, cake pans filling them 1/2 full of water, and when trying to keep foods as cold as possible, always use ice water baths. Ice water baths are always colder then just ice. Even for coolers of beverages, add water and ice and your beverages will always be colder then they would come out of your fridge. Ice water baths are always 32 degrees. This is how all food safety companies tests their temp probes, take a cup (glass, paper, plastic etc) fill with ice and then fill with cold water... wait 2 minutes... take the temp.. it should read 32 degrees, if it does not, your thermometer is not working correctly.