FullVenue is phonetically powerful, easily passes the radio test, has a very smooth word flow, and very positive imagery. It's ideal for what you want because on the event organiser side it implies that using it will help fill their venue .. While on the event participant side it implies successful events at a "Full Venue" with lots of people.
Also, by not including the words "Ticket(s)" or "Event(s)", you also leave the brand open to future expansion into complementary services like reservations and/or table management in restaurants, supper clubs and nightclubs, where "tickets" might not necessarily be involved, nor where it would be for any special "event" (but they all take place at a "venue").
If you really want to include "Ticket", I still have TixStore (//com) .. and with "Event" , I think EventCasa already in the list above has a nice ring to it.
You wrote the above just as I was replying. I agree on the organiser side. But I disagree on the client side, as I think FullVenue makes it look like it's a happening/popular event/club/resto/venue. Although from what you're saying I suppose the extra benefit is that it could subconsciously make clients rush to get their tickets quicker than usual! lol