I like to stay at a motel-type drive up place when the girl doesn't have a place and refuses to get into my sex-van. I never had any issues with anybody weird showing up a the door and they are usually cheaper than the hotel type. Giving your info is going to be standard at any place and if you give them fake info and they notice, THEN you might get a visit from manager, but If you play it straight you'll be OK. They don't care if you are shagging, hell that's where a lot of their biz comes from... ask if they have a frequent shagger rate...
What I want is a hotel/motel with a cheap day-rate - tell them I need a quiet room to work from and shower for the day - then leave by 6 or 8 pm. Or if you just check out early, say by 8pm they might only charge you for cleaning the room, maybe $30-40 and refund the rest. Just tell them you got called away on biz. If they can re-sell the room (if the place is busy) they'd probably go for it... Or just complain like hell and insist they refund your money, stand in the lobby talking loudly (never yell) and scaring the other customers. They'll refund something to get rid of ya...
Negotiate, like Slim Shady, of course Slim would never get into this predicament in the first place, Slim'd get HER to pay for the room... a bottle of wine, condoms, lube, and probably some gas for the moped...