Senators in Saxbys

At first, we chose to sit in the front of the coffee shop, because our favorite spot in the back was taken.  As we sat and talked, we watched other patrons entering and exiting and shivered each time the door swung open.  A group of three friends walked in.  The first entered without incident, the second tripped over the rug.  He turned a half-second after his friend had done the same to warn him, "don't trip on that."
My friend and I shared their laugh.
Half an hour later, a large crowd settled near us, speaking too loud for our conversation to continue.  We moved to the back to take the only remaining empty table, the one by those three.
"Oh, just to let you know, ladies," The first who had tripped spoke up as we sat down, "we're expecting some senators in just a few minutes, and they're going to sit there."
"Really now?"  My friend played along, "Thanks for letting us know.  Is it alright if we sit here in the meantime?"
"That's fine, but you'll have to move later."
"Thanks," I replied, "Just let us know, we'll move when they get here."
Finally, our favorite spot in the comfy chairs opened up and we prepared to move once more.  Our friend at the next table looked up, concerned.
"You know I was just joking about the senator," He said, "You can stay."