• How’s it going?  (= How are you?)

How’s it going Dave?
Not bad. How about you?
I’m fine, thanks.

  • What are you up to?  (= What are you doing?)

How’s it going Dave?
Not bad. How about you?
I’m fine. Hey, what are you up to tomorrow night?
Nothing. Why?
Want to go out for a drink?
Sure.

  • Where are you off to?  (= Where are you going?)

Hey there Dave. Where are you off to?
I’m just heading out to the bank. I’ll be back in 5 minutes.

  • (Do you) Fancy…?  (= Would you like to…?)

fancy is usually used in these forms:
1. fancy + (v+ing)
2. fancy + (noun)

Hey Dave. What are you up to tonight?
Not a lot. Why?
Fancy having a drink?
Sure.