the demo-day treats were valued as they rewarded success and allowed the team to release adrenalin before moving on to the next iteration.
Agile remains an emerging methodology with no industry standard best practice. It's therefore important to invest in training and team-building activities in order to ensure everyone tackles each project with a similar approach. Just because we speak English in the UK and US doesn't mean that we shouldn't try to learn a few words in another language when we're abroad. The same applies to agile: being open to new skills will create a better culture of respect between team members and lead to greater project success.