The system is excellent - but - no need to put the bracelet on the waiter/s - simply locating a screen on a central place in the restaurant with the data/numbers showing there, while giving an pleasant sound at each new entry. This has been done in the past and gave good results , remeber always our midle east behaving........
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Report: Russia's Lavrov says Syria's Assad is not an ally (Reuters)
from the article: Israeli cafe chain's 'call-button' scheme has public steamed