I don't know if this counts because we aren't technically rivals but in my neighborhood there are a ton of indie bands. As far as I know we are the only band in the area that isn't. We're hard rock heavy metal. The way the neighborhood is set up all the sound from anywhere gets funneled around so that you can hear pretty much everything going on everywhere. We make a point of being as ridiculously metal as possible so they know what they are doing wrong (not that they're indie, which I like a lot of, but they all just suck). And then they try to do their thing, and then we come back over the top, and back and forth. This goes on at least once a week.