crews, cruise

Crews or crews is the plural ( more than one ) of "crew", meaning a team or set of people, working at the same job or task--
There are three crews, one for each shift.
This is where the people from the train crews eat their lunch.

Cruise or cruise ( rhymes with crews ) means to take a trip by boat or ship, particularly to sail about, instead of going from one place to another--
They plan on taking a cruise to Florida.
His ship is on a cruise, and won't return for several months.

Now that you know that, you can say--
"There are crews of people, day and night, working to make this cruise a pleasant experience."

Note--"crew" also means the team that rows a racing shell or scull, so "crews" would mean more than one team--
The crews are warming up for the race.
Note # 2--"cruse" ( rhymes with crews ) means an earthenware bottle or jar for liquids--
She brought home a cruse of olive oil as a souvenir of her trip.