Hello my friend,

I wanted to invite you to a concert that I am going to next week. It's a really cool band that I know you would enjoy. The concert is on Saturday night at 8pm and I already got us tickets.

I think it would be a fun night out and we could grab some drinks before the show. Let me know if you're interested and if you're free that night.

Hope to see you there!

Best,
[Your Name]