For women: You want to wear something classy, yet sexy. This way you look professional but the guys wont me able to take their eyes off you. Wearing a low cut, or revealing out fit may give you the upper hand in a game. but you don't want to look slutty, then no one will take you seriously.
For men: You have a a more open wardrobe. You can wear almost anything but jeans and sweats. Dress pants, dress shirt, suits, khaki, all of these look professional and classy. You want to see like the "boss" of "big man" it is very intimidating. Do not wear any type of cap or hat unless apart of your religion or beliefs.
That depends on what type of party is being thrown. Some require you to wear a mask (like a masquerade ball). Others require full costume.(like a costume party). You should probably ask the person who's throwing the party. If that's not possible, just wear what you feel is appropriate.
a dress
Yes, Any one should wear blazer with jeans to a party. But, That should be perfect match and attract others.
parties
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It depends on what kind of party. If it is work related, she should wear a suit or dress. If it is social, then anything she wants.
you should wear a blue sparkly dress that is if youre a girl a boy wear a tuxedo
A tank top?
Yes, and you should
You should wear your best outfit you have and get answer.
What you should wear will depend upon the type of party. If the party is more casual, you can just wear pants and a top. If it is more formal, you should wear your best, such as a dress or tuxedo.
bright colors