Harddance includes genres like Hardstyle, Hardhouse, Hard NRG, Hardtrance, Jump and (arguably) Hands Up and Donk/Hardbass/Scouse/Bounce House. That may seem like a lot of styles under one roof but the 4/4 hard kick and the high energy is the uniter. It's truly party music and there's quite a few bronies making it (so spin that harddance Vinyl Scratch).
Check out these artists above who specialize in this style of music. (click on any of the subgenres)
Feel free to recommend some artists not included in here (these artists specialize in it) or include up to 10 of your favorite acoustic tracks in the comments section (for an eventual best of countdown).