Okay, this is what I've been doing so far.
I've mastered the art of swaying in a fairly relaxed way. I definitely need to upskill my dancing soon though.

The least embarrassing dance for people that "can't dance"
(Smiling throughout of course. Keep it loose. Give it a bit more swagger if you are genuinely having fun, otherwise people will see right through it...so I've found)
Beat 1 - Standing normally, natural stance
Beat 2 - Lean back to the left, left knee bends, weight off the right foot as it points out to the right slightly
Beat 3 - Swing back round to centre, right foot back facing almost forward in natural stance
Beat 4 - Lean back to the right, right knee bends, weight off the left foot as it points out to the left slightly
Repeat
...always to be done with a bottle of beer held by the waist to save embarrassing arm movements that show off the inability to dance

Sounds gash. Looks OK.

I like the sound of salsa. Probably conveys a bit more passion than the Ford Fiesta of dancing that I've just described above.