Thank you Backpacker for an interesting contribution.
However, this club has over 1000 members and really ought to be able to manage whatever income streams are presented without that task becoming too onerous.
The same penalty would apply for example, were I to pay by debit card (but cash is my preferred means of payment since I have it in my pocket) which completely removes any obstacles such as those you have outlined.
In the club where you banned cash, does that mean that if I wanted to hire one of your aeroplanes for 10 hours you would not accept payment in cash?