I Have, and have had a few parties. Mainly children and teenagers. Not rent paying money but always fun to play to younger crowds. The children don't have to have had 2+ pints of Stella to get on the floor and the Teenagers always like a bit of Pendulum (drum and bass - Get's your adrenalin going!) or some such heavy stuff you don't always get to play at weddings etc.
Right now I'm getting constant phone calls from companies that want me to advertise with them. When I tell them I am doing ok already with yell.com and my own search engine optimization techniques plus let's face it, not a bad site as far as customer facilities goes, they tend to give up and in the case of today just slam the phone down without even saying goodbye. Bastards. Some of these companies just don't give you a good service at all. I'm dealing with one at the moment that took a large payment out of my account twice in row for the same thing. If you're running a young small or medium business, my advice is to Google them before agreeing to ANYTHING! I wish I'd thought about that myself a few times. I won't hesitate in the future. If they're in a hurry to sell over the phone, the most likely reason is that they've got some chink in their service that they don't want you to find out about. Seems a bit wary? I speak from experience. Always insist on paying by cheque afterwards instead of giving out your card details. Then the onus is upon them to do their job just like in the old days. if they don't agree, they ain't telling you everything. Drop em without emotion and move on with your unhassled life!
Have a great week and I'll see you next time.