I have to disagree with most of what has been said - although I have only been to Box during the weekends.
If you get to Box early (I'd say between 9:15 and 9:30) you will avoid a long queue to get in - leave it any later and you will have to wait. Everyone knows that - the earlier you are, the better chance you won't have to queue. You come to the bouncers, who are pretty huge, the biggest I've certainly seen in Belfast, but they aren't scary. I have never had any trouble getting into Box, even on my 18th birthday. I certainly am not fake tanned within an inch of my life (I don't wear it) and don'ty exactly show off more flesh than clothing. My boyfriend also has never got turned down from Box. In my experience, they will only turn down those who seem like they would cause trouble inside - or rowdy people waiting in a queue. If you want to get into Box, queue quietly, chat with your friends, don't act like an idiot, because they don't seem to like that.
The one thing that keeps me going back to Box is that it's spacious. You don't feel claustrophobic here unlike in most nightclubs. And the seating is great - if you get there early you are almost guaranteed to be able to take your pick of the seats. Bar staff are brilliant and really great at making cocktails (try Skittles, they are gorgeous!) - you could be waiting a while at the bar at times, but it's never more than ten minutes, which is quite short compared to some other nightclubs I have been to.
Most of the time, it's a fiver in, sometimes about £6, which is good considering MClub charges you £8 on a Saturday night. Drinks are usually about £3 and up. I diagree with what people said about the crowd - I have never really heard of underage ones getting into Box - they usually get turned down and eventually drift over to Beach Club, that seems to be the cheaper, 'tartier' club in the Odyssey. Also, the crowd I've been in with all seem a little older - perhaps early 20s - it's rare you will come across a group of 18 year olds.
Box is a great night out for all those wanting more mature company than in other neighbouring nightclubs. read more