Just came back from a two-hours cavalry training. Eight people, half in modern outfit, half in uniform.
It was awesome. Weather was good, horses were great, only my horse(rental, btw) was afraid of sabres so I couldn't join until the last rounds after I switched horses and borrowed a sabre.
So, two lines of 4 people charging trough eachother. First step, then trot, first few sabre clashes, and eventually we did a controlled gallop without clashing sabres. Damn, riding in a gallop over a field, sabre in hand... I honestly had to control myself not to charge all out. It's just so epic.
Oh and of course we trained formations etc too