Why Beano?

[pinstripe]

Why is a coach party called a beano?

[Sam1960]

this any good ...
http://www.merriam-webster.com/dictionary/beano

[Jackdaw33]

Not just a coach trip but any jolly celebration. It's short for beanfeast, a party with plenty of food and drink.

[jno]

beanfeasts were staff parties/dinners thrown by employers. Beans were often on the menu, hence the name. The air must have been fragrant.

[Buenchico]

The term started off as 'bean-feast' ("An annual dinner given by employers to their work-people. Also, (colloq.) any festive occasion"), with printers later abbreviating that to 'beano' and then . . . "Later, in gen. use, a festive entertainment frequently ending in rowdyism".

[Definitions in quotes derived from the OED website]