rules for advertising at repair cafe's

[repaircafefairfield]

Are there any rules regarding advertising at a repair cafe?  If a fixer is volunteering their services on behalf of a business, what degree of advertising is permitted?  Some of the questions we have include:

- should they be allowed to hand out business cards to the owner of the repair item?
- should they be allowed to wear jerseys advertising their business?
- should they be allowed to introduce themselves as a representative of their business when they meet the owner of the repair item?
- should they be allowed to place an advertising sign (sandwich board) outside of the repair cafe venue?
- should businesses who make corporate donations of food, refreshments, tools, and repair supplies be acknowledged?
- what is the difference between acknowledgment and advertisement?

The underlying question is: What is the goal or purpose of the repair cafe and how might commercial advertisement enhance or diminish those goals?