This sweet, near-15 minute video comes from Tim Buys. This is what he says –

Gedinne, a char­ming lit­tle vil­lage at the bor­ders of a nice pad­dock. On the edge of that pas­to­ral pad­dock a beau­ti­ful road that climbs and des­cends, tur­ning left and right, and which, for­ced by the logics of ben­ding and swee­ping in all kinds of direc­tions, ends up where it first star­ted. Which turns out to be very prac­ti­cal when you want to lap that road on your motor­cycle. Lap­ping this road seve­ral conse­cu­tive times you end up having a race, a beau­ti­ful race, a hot race! As eve­ry­body wants the che­que­red flag first all ends up in the heat of the fight. And because of that heat they get thirsty, so some of them decide to mount a tent, put some tables and chairs in it, and a bar, of course.

Need­less to say that those guys were Belgian adepts of classic racing motor­cycles. So they foun­ded a club they named CRMB (Clas­sic Racing Motor­cycles Bel­gium). An English name yes, because as good Bel­gians they thought it sounds better that way. The races are open to all pre-1972 motor­cycles and you could take a one-off licence for this event.