(The “treating” rules were brought in to end the widespread bribery of voters in the 19C, when people would be plied with food and drink to gain their support. Well I’m afraid it would probably work with me. Two beers and I’m anyones.)
Political activists in the UK are banned from serving anything more than light refreshments, such as tea and biscuits, at meetings. Anything else is an offence called “treating” and punishable by a year in prison or an unlimited fine, under the the Representation of the People Act 1893.