If it’s a matter of being unable to get your entire class to a Catholic church to have Mass, than it would appear that it would be acceptable to have Mass in the Hotel. Sometimes at conferences for Catholic events they will hold Mass in a conference hall because everything is happening at that hotel. It’s pretty normal and the conferences I’ve been at have been pretty reverent.
Although I never expected to find a Mass in a casino, I’ve seen two bishops concelebrate in one.
Ok, actually it was in the conference center

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It was the catholic school con fence,and the 10 year anniversary of the diocese, so the first bishop came back.
As for the location, the casinos have the conference centers here, and the family that used to control Stations are long-time backers of Catholic education here, and gave the diocese sweetheart deals.
Need and pastoral concern make for intestine liturgical settings.
The is (or at least was) a Russian Orthodox group holding Divine Liturgy in a room in the basement of the parish center of the Reno Cathedral.
There used to be a church at Lake Tahoe whose side walls opened up to additional outdoor seating to accommodate the summer crowds.
And my daughter had the only licit outdoor Catholic wedding of which I’ve ever heard.
For reasons on which I’m unclear and from before I came to the parish, we have a second consecrated altar, dedicated to the Theotokos, in one of our outdoor patios.
The expected crowd was larger an the church could handle, so we set up out there, not only using our portable icons, but hanging a temporary iconostasis made from fabric.
It worked so well we now doe this each year for Pascha (but we’ve dropped the hanging fabric iconostasis) .
hawk