Four-on-the-floor is the simplest possible kick pattern: bass drum on every beat, no syncopation, no variation. It is also one of the most useful. Disco invented the modern version, dance-pop never let it go, and country two-step has always lived there. Most modern dance music — house, techno, EDM, the back half of a Top 40 chart — is some flavor of four-on-the-floor.
The technical challenge is endurance. A quarter-note kick at ♩=120 means 120 strokes per minute, every minute, for the length of a song. Heel-up technique is essential; heel-down will fatigue inside thirty seconds. Bury the beater for tight, modern dance-pop articulation; let it rebound for older disco where the kick should ring slightly.
The third exercise adds the hi-hat foot on the offbeat 8ths — the "open chick" pulse you hear in disco recordings, where the right foot pumps quarter notes on the kick and the left foot pumps quarters on the hi-hat pedal, offset by an 8th note. That pattern, two feet alternating, is one of the foundational dance-music textures.
Exercises
Kick on every beat, hi-hat 8ths on top, no snare yet. Use heel-up technique on the kick — heel-down will tire before the bar repeats twenty times. Each kick should be the same volume; the temptation is to lean on beats 1 and 3, but in dance music every beat is structural. The whole engine is the even-ness.
Now the snare lands on 2 and 4 — but the kick is still on every beat, including 2 and 4. Hand and foot land together on the backbeats; this is unusual coming from a basic backbeat (where the kick stays out of the snare's way) and feels strange at first. Once it locks in, you've got disco. Hum any classic disco hit you know — the kick is on every beat, every time.
Right foot plays kicks on every beat; left foot plays the hi-hat pedal on every &. The two feet alternate, eight 8th-notes per bar, four kicks and four hat-foot chicks. This is the classic disco texture — Earth Wind & Fire, Bee Gees, every dance club from 1976 onward. Coordinating it the first time feels impossible; isolate the feet first (no hands), then add the hi-hat 8ths, then add the snare. Then it suddenly works.