Be patient you'll get served.
I always get waited on, there's a wait during high volume times and during "snowbird" season. If you are there currently, it is also Spring Break. You hit the Trifecta. Enjoy the music and meet some cool people.
I usually don't have too much if a problem getting waited on. This us a very busy location and sometimes due to volume it may take a little longer but I don't have a good answer for you.
You must get their attention. They are usually very busy. All of the staff is very nice.
Not sure maybe you should make yourself more noticeable.
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