Business is usually done over a beer but don't get your advice from the pub.
Years ago when I was a young accountant who frequented pubs I remember being intimidated by a guy who told me "I earn in a day what you earn in a year -- and I pay no taxes". Intrigued I listened, further confused and feeling somewhat insulted at the "advice" he gave me.
My insecurities were put at ease when I saw him on the news the following week, for unpaid taxes and illegitimate business schemes. He was a convincing guy who had me second guessing what I knew. Experience serves me well now but for those new to business, pub advice is the advice you shouldn't take without seeking a professional second opinion.
Here is some advice you may hear over a beer this summer. Don't take it.
"Don't declare your income including your cashies." If you run a cash business who's going to know what's not going into the till right? Pay no mind to the fact your declared income is peanuts yet you have the house, large-screen TV, nice car and the kids have the latest gadgets. The IRD's not going to probe you, surely.