Fundraising HELP!?

Hey guys so I had an lovely weekend with Sarah, we went and saw rise of the apes today which is pretty good film. So I’m here to get advise from you lovely people! So I’m going to hold an event at a club at the end of November to raise money for the charity Clic Sargent. Which has helped me out awesomely this past year and more. Also the money is going towards the total that my brother in law needs to raise for the LONDON Marathon in 2012. So we need over £3000. Has anyone got any good ideas for that event? I’ve already got a free venue and disco but what would guys do through out the night to make it interesting?