Personally, I follow Emily's guidance on all my TEG postings:
The fact that slang is apt and forceful makes its use irresistibly tempting. Coarse or profane slang is beside the mark, but "flivver," "taxi," the "movies," "deadly" (meaning dull), "feeling fit," "feeling blue," "grafter," a "fake," "grouch," "hunch" and "right o!" are typical of words that it would make our spoken language stilted to exclude.~ Emily & Steve
LOL @ #3. Love silly people, they are very entertaining! And on #6, nowadays you would probably be considered rude not to ask before hand what food allergies/restrictions your guests may have, much less fix someone a plate. Random women sitting around looking hungry...not at my parties. Hehe... For #8, I don't know about tea pourers, but I always tell my favorite people to come an hour or so earlier before the other guests arrive so we can get our visiting in first, before my introverted self is burned out by the rest. A little wrong? Not if they don't know!
I have a flivver in my thumb from one of my rake handles....maybe that doesn't count.
But I'm with Steve, I try to only use the nicest slang so my posts aren't so stilted.
Right-o Steve!