I still have my long-sleeved "Libertarian Party of San Francisco" shirt
with the Statue of Liberty on it. I could bring that and wear it over my
sleeveless shirt if it's not too hot and nobody thinks it is
inappropriate to wear it in the Outright booth.
The sleeveless shirt I'm planning to wear is colorful plaid. Maybe we
could all wear colorful stripes or plaids, sort of a rainbow theme. That
could also be cheerful and eye-catching.