not offically so that we have designated time for wrestling, bjj etc etc
My small club has one dude who did greco for 15+ years, competed on a national level, this is my main sparring buddy and the assistant coach
one dude who boxed and was a fight or two away from the olympic team in 88
had a uzbeki or something dude who had done sambo as a kid for a couple of months
Some of the comp judokas at my motherclub (we are an offshot) attend wrestling practises and bjj
often crosstrain with a few blackbelt TJJ guys