area cigarettes danger direction environment health health risk no smoking no smoking in this area sign not allowed pollution prohibition sign unhealthy warning advice amenities approved assistance blue care communicating communication conditions helpful hot-tub hot-tub-spa hydrotherapeutic-massage hydrotherapy indication indicator information informative informing jacuzzi outdoor outside red risk risky safety signs unhealthy-risk water white words appropriate behavior appropriate behaviour no spitting not permitted penalties permission denied prohibited spit spitting no smoking sign alert appropriate-behavior appropriate-behaviour health-risk no-smoking not-allowed not-permitted permission-denied expectorate expectorating historic-sign no-spitting old railway-platform appreciated black symbols thanks black-&-white gray grey greyscale announcement be-careful beware caution concern consumption dangerous faucet listen Look looking lookout protect protection risks rules tap undrinkable warning-sign