Dear Sir,
No playing video poker and watching you scratch isnt romantic. Riding the gondolas at the Venetian is. Now that we got that covered... BUT, if romance is your goal dont ride them indoors. There is nothing remotely soothing about being in a gondola on a man made lake while people point and stare as they shop.
Opt for the outdoor adventure, closer to sunset though. Now thats the plan of a man who actually doesnt wan to sleep alone. Carry on sir, carry on.