Let's eat out tonight.
I feel like going out tonight.
feel like doing=want to do
How about going out for something to eat?
Let's not eat in tonight.
Let's get a bite to eat.
What are you doing for lunch tomorrow?
Would you like to join us for dinner?
Can I take you out to dinner sometime?
Maybe we could go out to dinner sometime.
Would you like to go out to dinner with me?
Let's stop somewhere to eat.
A: I'm going out to eat, would you like to keep me company?
B: I'm not hungry, but I'll sit and have a drink while you eat.
A: Do you want to grab a bite to eat?
B: Oh man, I just ate. I wish you'd asked me half an hour ago.
A: I don't feel like eating in tonight. Let's go out.
B: Well, oK. I guess dinner is on me tonight. Did you have a restaurant in mind?
A: Not a particular one, but remember it's better to sit at a booth with the kids.
B: Right. How about Benny's up the road? They have booths and a kid's menu, so we don't have to pay an arm and a leg for them.
pay an arm and a leg
A: Sounds perfect.