It's probably fine for a threesome, but I make up my first impression of hotels by smell. Here, the mustiness mixed with chemicals hits the nose from the reception.
The hotel does not have its own beach, you can use a public one. Beach towels are provided on deposit.
Among the advantages: free safe, Wi-Fi, cost.
I would put 3+, but there is no such rating, so I give the hotel three stars and an identical number of stars here