For me the ban on smoking in bars was a great leveler, smokers would have to go outside and hang out with people that are all in different groups inside and eve

For me the ban on smoking in bars was a great leveler, smokers would have to go outside and hang out with people that are all in different groups inside and everyone would chat to each other. Obviously "take up smoking" is bad advice, but is there anything else that forces cross group interaction like this?