I’ll have you know that my suggestion doesn’t need enlarging thankyouverymuch.
my girlfriend says it’s a nice size
“Watchman! What of the night?”
Too old school?
Hey, howyabeen?
Hiya!
Hey, you!
Wow! Great to see you!
Hey! You been well?
Howzitgoin? (How is it going?)
Howrya? (How are you?)
Those are just casual slang greeting I use for friends, and other people I know. I use more formal “Hello” and “Nice to meet you!” greetings at other times.