Here's something to consider trying:
If you find yourself in a situation like springfield describes, simply respond to the person's initial statement to you by posing a question back to them - quietly, politely, and with a smile. When they reply, ask another appropriate question. Another reply, another relevant question, and so on:
"Is reserving a spot really allowed?"
"Is management o.k. with permitting reserving a spot?"
"Is there something particularly different about this spot versus another one?"
If you handle the situation in a non-confrontational manner - and your questions don't become personal, snide, or snippy - the person thinking they have dibs on the spot will either tire of it all or, as others around you start to see and hear what's going on, they'll quickly make themself look foolish if they continue to pursue it.
You've controlled the situation, stood your ground in a non-confrontational way.......and hopefully made a completely rational point to the spot-squatter in the process.
Just a thought............
Bill
