Accept an invitation to eat Sushi
Sure, why not?
Invite your friend to go to the beach
Do you want to....? Are you free...?
Refuse an invitation to the amusement park
I'm sorry but..., I'd love to come but...,
Invite your friend to Karaoke!
Why don't we do Karaoke together?
Invite your friend to go skateboarding
I'm planning....? I'm going...?
Invite your friend to play games all weekened!
Would you like to...?
Invite your friend to go travelling
What about....? What do you think of...?
Invite your friends to your house
Would you like to come...?
Refuse an invitation from your friend (go camping)
It was nice of you to invite me.... Sorry, I have other plans.
Invite your friend to drink coffee
How/What about some coffee?
Invite your friend to watch some shows with you
Why don't we...? How about...?