The music practice rooms I've seen in halls are just rooms with pianos etc. There's plenty of proper places for bands to jam though, around the city itself. Where you're living doesn't really make any difference in that respect.
Get an overdraft with your bank. Most of them offer students anything from £1000 upwards and everyone I knew (with the exception of the very rich) had one and used most of it. A part time job would help too though.