How do I find a convention that would cater to people who stand or walk a lot on their job?

I would like to be a vendor at a convention where people walk or stand a lot would show interest. Say postal workers, waitresses, machinists, nurses,

I would like to be a vendor at a convention where people walk or stand a lot would show interest. Say postal workers, waitresses, machinists, nurses, etc.

or:I would like to be a vendor at a convention where people walk or stand a lot would show interest. Say postal workers, waitresses, machinists, nurses, etc.

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