When do you use "come" and when do you use "go" to talk about attending an event? Here are some guidelines:

• Use "come" to talk about an event that you're having at your house or office, or that you're organizing.

  I'm having a party. Do you want to come?

• Use "go" for an event that you're not going to attend.

  I'm not going.

• Use "go" for something that you're planning to go to, but use "come" to talk about the listener joining you:

  I'm going to this Halloween party. Do you want to come?