Gym Rudeness

Today is back to the normal work grind, which is a good thing because once again I have huge piles on my desk. The gym managed to open 20 minutes late today which messed with my workout (and this is becoming a constant problem for this gym). Oh, and I failed to mention on Monday the piece of rudeness which took my breath away. I take a morning spin class on Mon/Fri. The rule is that everyone puts their towel and water on the bike of their choice, and yes some of us have bikes we always pick. Then, most people go warm up on a treadmill or stretch until the class starts. I went on monday to warm up and came back to my bike to discover another person in the class removing my bike seat because the one on the bike next to it was broken. I was stunned, my bike had a towel on it and was clearly going to be used during the class and he simply took the seat anyway, when I showed up he refused to put the seat back and did not even apologize. Thus, I was forced to find another bike in the very small room. So, now the bike I always use is broken and unusuable. I am contemplating preemptively stealing his normal bike on Friday just to point out how rude he was on Monday. However, I do not think he will get the hint especially since my polite "excuse me what are you doing to my bike?" had no effect. I hate people like that, especially since there were multiple empty bikes in the room which he could have (a) moved to or (b) switched seats with and not mine. Sigh, I will never understand how people's brains work.