Wow, care to narrow this down? I see regulars host events from time to time, and when they do it enough they sometimes get chosen for GoA, AoA or tournament and ladder leader. If you have a party or something that you think many would attend, PM Delphina (or a couple ambassadors). If you want to host a tourny and get some kind of play reward, PM Samhayne. Regulars host events pretty often.