I have recently had fairly good experiences in VA hotels in Tysons and Reston.  Yes, they are mostly empty, but the desk personnel remain quietly detached and let me go about my business.
That contrasts with an unfortunate experience I recently had in a Rockville MD hotel.  When I walked into the cavernous lobby of this dead hotel the desk clerk immediately asked what room I was.  I had to give him a lame answer and retreat. Since the hotels other entrances were all locked tight, I had no choice but to cancel the appointment.

It makes me wonder what percentage of local hotel business the sex trade represents.

During my recent trip out to the D.C. area,  there were zero issues at the location I was at nor was I or any of my guests ever bothered.  

 
Your provider of choice should ensure you make it to the room with no hiccups. Hopefully, shortly before you even step through the front door of the hotel, the provider will have given you step by step directions on how to maneuver past the front desk and to the elevators with ease. I encourage you to walk in like you belong there - as if you checked in hours ago or the previous day. Something I recommend is maybe have a briefcase and act like you're on the phone with a business partner or client. Most desk staff are not going to bother you.

 
Another tidbit of advice is that depending on the hotel, it may help to "dress" the part. This doesn't necessarily mean a suit and tie but I always recommend jeans, loafers, and a nice button down and/or sweater and jacket. Hotel staff rarely, if ever, give men a second glance when dressed like that.

I haven't gone to a hotel. I had to wait for the girls to come down to get me as the door was closed and only guests can go in but had no problem. Every other time, the hotel was a ghost town with only a few cars in the parking lot.  

To avoid surprise, simply ask the provider if there's any special instruction to go to her room at her staying.

Don't make eye contact with front desk staff. Walk purposefully, like you belong there. Look for side entrance. The majority of hotels have them (restaurant door to hotel, for example). I haven't had any issues.

Been to a few in Tysons. I have also hobbied in other areas like NJ, NY, CT.

Never once have I had an issue in a hotel. If anything my experience is that the desk staff is more detached and stay out of the way than when things were "normal". There is still business and people coming and going so it's not like you'd stand out.

What I sometimes do is just pretend I'm on the phone in the middle of a conversation if I see staff on the floor but I was probably being overly cautious. I really don't think there's any issue with seeing a lady at a hotel incall.

At least for the hotels around BWI and in Rosslyn, VA.  Just don't forget to wear your mask and as already noted, look and act like you belong there.

Dress like you belong there

I always go to meetings dressed well.  Not in a suit or tie, but in black slacks and a button shirt.  Something that looks business casual.  I also ask for the room number and where the elevator is beforehand, this way you don't look lost in the lobby.  If you "look" like you know where you are going no one will ask why you are there.

Have had appointments at several hotels around the DMV and elsewhere since the pandemic started. A couple of those required a key for the elevator, so my date had to meet me downstairs or stash a key someplace. Otherwise no problem.
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Was recently out of town, and had an appointment at a hotel with a huge lobby. Had to cooly make a lap around the lobby before finding the elevators, which were actully close to the door, but the front desk guy didn't even look up.