SightRead.org now has a fourth (ha!) metronome option: 4OTF (short for "Four on the Floor").

What is it?
Four on the floor is a drum pattern where the kick drum hits on every beat. It's the foundation of disco, house, EDM and such.
How it sounds
- Beat: A deep kick drum sample on every beat
- Subdivisions: A hi-hat click sample on the subdivisions
The strong/weak/subdivision volume controls still work as usual, so you can adjust the balance to your preference.

How to use it
Select "4OTF" from the metronome dropdown next to the tempo control. You can also bookmark it directly: sightread.org/#c=four.
but... why?
Oh, what's life without whimsy?! Music is supposed to be fun. I'm more of a metal/grunge fan so boom-ts-boom-ts ain't my thing, but I do find it fun to practice with this metronome. Love it, hate it? Let me know.
Happy dancy sight reafing! 👀