As someone with a background in business and finance, I'm wondering why this industry doesn't adopt retention models, such as 'come five times, get the sixth at half off' or 'come nine times, get the tenth for free.' Wouldn't this encourage clients to visit more often and to stick long term with the same provider? I understand that tracking might be challenging, but perhaps it could be automated with a website. Clients could create an account to access these promotions, or a ticket system could be used. Just a thought – business/finance crosses my mind when I'm not feeling horny; it's my other passion. Not that I'm not feeling horny now, but I'm in between, hence thinking about both business and pleasure.