The virus and Governor Sisolak are controlling the fate of LPIN as we know it, so it's still a big unknown as to when the brothels will reopen for full service. We're all waiting...
As for the Desert Rose, I've never partied at their brothel, but I've visited their place a couple of times. They have a nice little brothel. In their bar, they also have an area where some of their ladies pole dance. I've been told that a lot of locals hangout there. I spoke with the folks running the place and they are nice. If you have time, it's worth checking out, even just to have a drink and to get feel for the place and their ladies. Although, they open later in the afternoon at 4PM, while the other brothels open much earlier.
My favorites have been working at Mona's/Inez, Sue's, and the Dovetail, so I tend to frequent those houses. The Dovetail is a cool log cabin and Monica runs the brothel. It's a favorite of many of us, since Monica and the ladies treat their customers like family. It's very laid back and low pressure.
Mona's and Inez are both nice houses. If you reach out to Louis (the owner), he will answer whatever questions you have in regards to your needs and they are known to take good care of newbies and those looking to lose their V-card. They also have special rates for customers who are active posters here on the SIN board. If you've done your research on the board, you may have read about this in a number of threads and reviews.
Sue's Fantasy Club is an all Asian brothel, next door to Mona's. They have some nice ladies working there too and I've partied there on a number of occasions, although they tend to be more high pressured and geared for those who have been visiting the brothels for awhile. They may be a turnoff for some newbies, since their ladies want you take a tour and party as soon as you walk in. You can always decline and have a drink at the bar and chat.
As for outdates, as Phoenix pointed out, they are only legal in certain counties such as where the Mustang Ranch and the Moundhouse brothels (MLBR, Kit Kat, LRN, Sagebrush) are located. For a newbie, I don't think an outdate is a good idea considering the cost and you have no idea as to whether you and the lady you decide to party with will "click". It's probably wise to do a simpler party. You always have the option of rebooking/extending the length of your party too, if you decide you want more time.