Freedom of Expression

Americans have the right to protest.  They have the right to hold signs up to show how they feel.   That is Freedom of Expression, which falls under the Freedom of Speech umbrella.

Sometimes Freedom of Expression might call for disrobing to express yourself.  Just don't get too expressive while you are nude or you might get arrested.

I was wondering, what if a bunch of nude people are protesting and it is time for a lunch break and they all walk over to the neighborhood diner and walk in naked.  Is it OK if the manager offers them a paper towel to sit on?