Being married, fair enough if that why there's a line for intercourse. But if that were not the case would you? and if not why/how is that different from the services you have paid for?
p.s. I don't know about in the US but in the UK it's kind of frowned upon to cum during a lapdance.
It's legal here. But the risk of getting arrested in some places is a good reason why people wouldn't be up for it. Or maybe some people like the thrill.