I know of the existence of https://www.misterbandb.com/ A gay version of Airbnb. However, I have never used it and I don't know how (potentially) sexual this is.
I know some sites like planetromeo.com, Gaydar, bearwww.com etc. have a travel section where you can list your future travels and where members offer accommodation (ads). Usually when you list your travel plan you get messages from other members asking if you're looking for accommodation. You can add in your travel plan you're looking for a room and wouldn't mind having some fun with the host(s) (be as specific as you like if you want sex). Additional advantage is you're not only contacted by potential accommodation hosts but also by locals or other travellers who can see your travel listing and like a sex date while you're there.
I used planetromeo.com for my visits to Rome (because GR is one of the most used in Europe). Also for other destinations btw. The B&Bs I ended up in in Rome were owned by gay guys but I didn't have sex with them (one wanted but he turned out to be a bit creepy, one was a big dicked Muscle God but I wasn't his type [He escorted on the side btw], one was a monogamous couple and one was a professional B&B owner who did not have sex with customers), I was bombarded by local guys for sex and had my agenda filled upfront with fuck dates. My face has been in many Italian pillows while I was getting pounded. Most raw. LOL!
Obviously you can also use Squirt to look up gay hotels/B&B or place and ad and/or list your travel in the regional sections here on BZ to the appropriate regional sections to ask for suggestions/experiences. Do this well in advance as soon as you know your firm travel dates for your location. Then guys have plenty of time to contact you and you can filter out the best opportunities.