While it is a good idea to have something in the background to set the mood you have to be careful with your choice. Videos showing fucking and sucking are not appropriate. Loud, hyperactive dance music is also inappropriate. Having munchies to satiate cock-inspired appetites is a necessary consideration. Keep it simple - fruit, vegie dips, french bread, savoury biscuits, cheese and other bite sized goodies.
Plastic cups are handy.
Guests must take all their clothes off when they arrive. Have paper bags ready to put clothes in. Rules You may want to have a list of the rules for the night posted up and clearly visible to arriving party goers. If you do, your close presence as host should cool things. If you want to fuck or suck, please go home and do it there.