With regard to refreshments served during workshops, I normally:

Provide nothing -- participants buy or bring what they like.
20% (3 votes)
Provide coffee and tea.
13% (2 votes)
Provide healthy snacks to stimulate thinking -- fruit, nuts, water, juices
53% (8 votes)
Provide delicious treats: cookies, chocolates, pastries.
0% (0 votes)
Put candy on every table.
13% (2 votes)
Total votes: 15