Has anyone heard of/ doing this?

My FFIL told me we had to have a hat passed around at the reception for everyone to give us money. I thought maybe that would be kind of rude, but someone else said we should put a tip jar by the bartenders for us(not doing this to me that teases them and they have a set rate and we may tip after wedding). My FFIL said they had $1800 from just the hat alone. My FH thought all the groomsman of whom we do all trust and they are all really outgoing could take turns doing this, so it's not like we would be passing our own hat around. It would fit into our theme with a cowboy hat too. What do you think ladies?