The old standbys for single men (straight and gay) that want to stay in hotels in Colonial Zone that allow them to bring back Dominican guests are: Roma (I and II), both on the Conde, and the Discovery Hotel, has né block off the Conde. IDs of guests are always required, either left at the front desk or a Xerox copy taken of it, depending on management). As of a couple of years ago, neither Roma charged for guests and Discovery may or may not have charged a small fee like $5 - $15 per guests visit.
I didn’t realize the Mercure is now shut down. That was always a good option because it’s right on the Conde and they had a pretty awesome patio breakfast. It was $15 to bring back a guest with ID.
I was never much of a fan of Hotel Duque De Wellington as it was a bit of a walk from the Conde and the boys that hung around there weren’t my type.
Also not a big fan of Adam Suites Hotel. I stayed there once and once was enough. They always turned the power off, including hot water, and lock the front doors every night. A “security” worker was supposed to be there to open the doors for hotel guests but I seemed to be waiting almost every night for 10-15 minutes to get in, or to let a guest out because the worker was nowhere to be found. Also, the Wi-Fi was only available in the small lobby. But the hotel is gay, it’s across from the gay clubs one block off the Condue (if those are still open) and the area gets trafficked a lot by cruisers and by hustlers, if those things appeal to you. My suggestion for this hotel, if you decide to book there, is only get the big suite on the second floor that has the balcony overlooking the suite.