scientists have found people felt happier and more relaxed while eating at home .
about a fifth of the 1,000 meetings recorded took place over a meal , the journal physiology and behavior reports .
on these occasions participants felt happier and more relaxed , whether at home , at work .
they also believed that the person they were with was warmer and more likeable .
apart from anything else , meals can be lengthy and people meeting for the first time might struggle to come up with enough conversation .