Etiquette for Reaching Out To Contacts for Work?

I have a non-union post production job (VFX). Work has been slowing down since January, and I'm trying to ramp up my marketing to find more work and keep the lights on. Does anyone have tips on politely reaching out to past contacts? Should I just email and be, "Hey Friend! I hope all is well! I know times are slow but I've got some new demo reels to show off and am looking for my next gig! Let me know if you hear anything or if you just want to get coffee and catch up!"

Is there anything else? I haven't networked in years and feel rude and out of practice - especially given that we're all out of work together here.