What is the use of this building?

Symposium is closed and as per flyer handed out in street is now:
"Burrito Cabeza"
235 George St
AB25 1ED
Mon-Wed 11am-7pm
Thu-Sat 11am-8pm
www.burritocabeza.com

No longer Snappy Pizza. Now called something different.

This shop has moved to somewhere on St Machar Drive?

Is this a substation?