You can use this english conversation to invite your foreigner friends to the party or to the dinner. If you want to learn English better you should learn how to interact with English speakers in an appropriate way.
Example 1
You : Would you like to join us in the party tonight?
Friends : Sure.
You : Ok. See you at Peter's house tonight at 9 pm.
Example 2
You : Are you coming to the party tonight?
Friend : I'm afraid not.
You : How come?
Friend : I have to study for an exam tomorrow.
You : Well. In that case, I will have to let you go.
Friend : Sorry. Maybe next time.
Example 3
You : Do you want to join the party tonight?
Friend : I wish I could but I have to visit my grandmother.
You : That's alright.