Staff at Spirit Group pubs are being urged to lend a helping hand at their local as the company prepares for the July 1 ban.
Hundreds of company employees, as well as head office staff from Spirit and parent company Punch Taverns, will take part in the 'Help Stub It Out On Spirit Day' event on June 26 and 27.
Tasks will include tidying up outdoor areas, repairing and painting garden furniture, cutting grass and planting hanging baskets.
Inside the pubs, carpets and upholstery will be cleaned while toilets, kitchens and bin areas will also get a thorough overhaul.
Spirit's business development managers will run through a final no-smoking checklist at each pub to ensure statutory signage is in place and staff have been correctly trained on the law change.
Spirit Group's marketing director Jeremy Hipkiss said: "We want to make sure all our pubs are looking their very best once the smoking ban begins.
"The smoke-free environment will attract new customers into pubs and we have to make a positive impression to ensure their continued loyalty.
"Similarly, where outdoor facilities have been put in place for customers who still want to smoke they must look tidy and professional.
"We welcome the enthusiastic response from our team players who are prepared to put considerable time and effort into these final preparations for the ban."