My club has guests come in and do seminars. Recently we had a seminar with some Jiu Jitsu people and they showed us a lot of throws and other techniques (arm bars and stuff) which was really great. Unfortunately, at the moment, the club where I train has a hard floor, so takedowns must be done carefully. That suits me though, since I have a back injury which will probably never be fixed, so I don't like to hit the deck. Throws aren't really a part of the what we do where I train, but we are encouraged to use what works for us. Of course, some of the people I train with have studied Judo and other martial arts and everyone shares what they know. Advanced students can partake in sparring using throws takedowns and locks, but only if both people want to. Best thing would be to ask for it if you want to learn it...