Straight from the Haymarket Farmers' Market website:
"Haymarket Farmers’ Market has just about everything you need, so please leave these items at home:
-Weapons, personal knives, utility tools.
-Animals, no matter how cute or well behaved, unless they are service animals for disabled persons.
-Posters, placards, stickers, balloons or promotional materials.
-Haymarket Farmers’ Market organizers may refuse entry or expel any person, as needed, to maintain a positive and safe event for everyone."