Copy writing for promotion for events company

Topic: Promotions for events
Tone: Witty/Sharp
Outline & Structure: (many of these drop down menus are not working on my browser so can't say what I really wanted to say. The drop down menu for the deadline I am not able to update either. So the deadline is really the next few days, thanks )

I have just set up a business networking & socialising events based in London. I have to do some write ups on social sites to attract members and I am struggling with 'I don't know how to say this in an exciting way'.

If you do a great job I'd want to re-hire you for other work. I need a write up or 2 for social sites as well as if you can help me write a fab document to drum up sponsorship, would be brilliant.

My budget is not exciting! Sorry! For the above I could pay total £25 ish. Or less than a tenner an hour. In future when your copy has attracted loads of attendees then I will be able to pay more! :)
Extra notes:

I don't need 'articles' I need just some quick blurbs for event promotion on sites such as meetup.com, kweekweek, Facebook, etc. I envisage that I will want one short blurb and one longer blurb so that I can just quickly use variants of the copy for different sites. I need the copy to be punchy and exciting and nothing like anyone else in the same genre.

After the short and long blurb, then I am also working on a sponsorship document asking companies to part with their money for my events/website. I have researched what to say, and how to say it, but it still falls short. I honestly don't know how to come across and what is appealing to them.

Here's my meetup profile for more information: http://www.meetup.com/11-12-13-Network/