Yes, makes sense but I don't know other locked room movies, only Cube, Oldboy and Panic Room (which I didn't like).

Here's a only very slightly related recommendation: "Murder by the Death" (not "locked room", but "locked house"). A crime parody with Alec Guinness as blind butler Jamessir Bensonmum http://www.youtube.com/watch?v=LCecr_2Tnvs , plus Peter Sellers, Maggie Smith, David Niven, Peter Falk and, as icing on the cake, Truman Capote. Stupid, funny, but mostly for people who like crime parodies and/or those actors.

How about that semi shitty film with aliens that end up dying from water? Signs

They are trapped in the downstairs by aliens... Not sure how a boarded up basement is enough to protect yourself against aliens...

I'm ashamed to say I actually liked Signs

Well it wasn't terrible but after the end where you find out their weak point (water) it kind of ruined it for me.  I just don't see how water can be deadly unless you drown.  I suppose the alien could have developed on a world absent of water or something but that seems to be stretching it a little.

How about 127 hours?  It isn't a group being trapped in a room but the guy was stuck and ended up cutting his arm off.  I couldn't watch that film because I don't think I could bare watching someone (even fake) cutting their arm off.

Definitely watch vacancy.

Just realised I've seen this film before x_x

Devil it is a bit like that. But it is a good movie

Try checking out a 2001 movie starring Thora Birch and Keira Knightly called 'The Hole'.

Assuming we are talking about the same film, That is possibly my favourite M. Knight Shamalyan film EVER loved every moment of it.

I've seen that one as well.