I do it a fair bit.  I get them to meet at the local casino.  Lots of security there and a few thousand dollars doesn't look out of place.  I then get them to hand the cash to the croupier who count cash for a living and can spot counterfeits.  Also the casino absorbs the risks and you're not under pressure to count correctly.

Then take the chips off the croupier.  Again, counting 2x $500 is easier than a bunch of notes.

Scan their QR code on your phone and your done.