You may take part in unusual football (soccer) game with 4 nets and 4 players. Each player protects her net and tries to score goals to any opponents net.
When ball gets to some net - its girl-player undresses. To completely undress her, you must score 5 goals to her net. But if this player scores a goal to some other net, she dresses back.
Good luck! - and fantastic reward-shows from each girl!