Cotui is a typical Dominican town, not so much a city. It is a provincial capital so I suppose it is a city technically.
What's typical about it? The main road runs through the town, and is lined with shops, car repair workshops. Swarms of noisy motorbikes everywhere.
There's a 'multifamiliares' neighbourhood on the outskirts. The 'multis' are modern but fairly basic apartment blocks built by the Balaguer government to house (mainly) the party faithful. Colmados (grocery shops), hair salons and Bancas (betting shops) are the most common business. There are several car washes and discos.
Away from the main road you'll find a couple of better neighbourhoods with large villas. One is called Los Espa?oles, another is something like Los Mineros, built to house the workers from the Rosario gold mine. The rest of the town is made up of middle class and poorer neighbourhoods, almost all living in houses as opposed to apartments.
The most typical part of Cotui is the main square, known as 'el parque' with the cathedral on one side, and several restaurants, ice cream parlours and other such things surround it. Again, the buses, cars and especially motorbikes do their best to detract from the beauty of the park, which was re-done a couple of years ago and looks really good. Still, people use it as a place to meet and hang out in the evenings.
The river crossing outside the city is used as a beach by the locals. As you leave the town, you go past a couple of 'caba?as turisticas' which despite their names, do not cater for tourists.
Carnival (Feb) and 'fiestas patronales' (not sure of the date, but later in the year) are a big occasion for the people of the town.
Got your PM, so you must have worked out how to do that one.