Well, original jokes are somewhat cringy usually, although the right delivery at the right opportunity may compensate.
But anyway to explain it (if someone dancing to sirtaki while drinking mastika didn't get it), it's about crossing the o in road (word) conflated with crossing the road (infrastructure for chicken crossings).
Well, I did get it, I just thought it was the dad-diest of dad jokes. And fyi, I abhor both traditional dances and anything mastiha flavoured. For the latter, the obnoxious advertising, trying to pass it as a bezoar for every illness, real or imaginative, probably has a lot to do with my unfathomable depths of hatred.