Not exactly a daytime Civvy, but.
On the topic of daytime action in Vegas, if you are there for a convention with an exhibit floor, booth babes are a possibility. I don't mean going into the expo and hitting on women while they are working. These booth "hostesses" usually work a half day shift. That means for half the day they are free. I have seen many hang out at the bars in civvy clothes.
It is even better if you are working the expo. At CES my company had about 20 people to work our exhibit booth. We hired four "booth babes" to work the aisle and bring in customers. Two worked the morning and two worked the evening. One was from out of town. A couple of the sales guys with too much money were hitting on the out of towner pretty heavily the first morning. Late in the afternoon one of them came back bragging about how much he paid her for sex in his room (total slimeball). That night, another guy said he had hit her in his room, too. By the end of the three days, me and 2 other guys had "taken a break" with her, plus a guy from the company across the aisle from us. I know I paid $500 and it was well worth it.
I brought this up for guys visiting in general and not associated with the convention because when we were through, I walked her back to a bar near the expo and she immediately started flirting with some guy sitting by himself.