A major beer brand wanted to obtain quantitative feedback on a prototype design for a new draught beer dispenser for use in UK pubs and bars, including A/B testing to find out if the prototype design made beer drinkers more likely to select the client’s brand in preference to competitor brands. We helped the client set up a mock bar in a Central London research facility and recruited 300 respondents to visit the facility over the course of two days and complete the client’s online survey in situ. We also arranged a focus group of bartenders at the facility so the client could obtain their qualitative feedback on the design.