Bottle will deliver a a social media strategy for Bourne Leisure's Warner hotel brand, which has 13 hotels and coastal villages around the UK.
The target audience for the brief is adults aged 55-plus who are active and sociable.
This is the first time Warner has appointed a social agency. The company appointed Diffusion PR last year to raise awareness of the brand and attract the next generation of customers.
Warner marketing director Matt Finch said: "We were impressed by the way Bottle got under the skin of our brand and audience. It had a compelling strategy with ideas that will stretch us, which is exactly what we need as we continue to develop our brand and offering."
Account lead Natasha Hill, director of consumer and social media at Bottle, added: "The team at Warner Leisure Hotels wanted us to push the boundaries on creativity and had the confidence and creative aspiration to go with our ideas. It isvery innovative when it comes to creating memorable experiences for guests, and we are keen to replicate this through social and online channels."