open or closed?

i got to hang out with leslie and laura tonight. it was so nice.

but not so nice, or rather, more confusing, was our experience with starbucks.

first: leslie and i stopped by the one on line avenue. it was roughly 8:15, and it was closed... one of the workers was locking the door and told us new thing was that this starbucks closed at 8.

second: we went to starbucks on youree drive around 9:15, and as we were walking up to the door, people sitting outside told us it was closed but the drive-thru was open for another hour. a sign on the door said that as of 3/23 the store would close at 9 but the drive-thru would be open 'til 10.

so now i'm confused and wondering starbucks' logic: when we found the first starbucks closed early, naturally we assumed it was 'cause business was slow past 8 for them so logically they should close early. but the second starbucks, with their 'closed' store but open drive-thru baffled me. less workers needed to work the drive-thru only rather than the store as well? but if business is coming for the drive-thru, why not just keep the store open too? lights were still on, it didn't appear that any energy was being saved. if someone is more business savvy and knows the answer to this conundrum, please let me know. because i tried calling the store later (yes, that is just how concerned i was...and i'm not even drinking coffee these days, i was just curious from a curious person standpoint) but since they are 'closed' at 9 (and it was 9:50 at this time) no one answered my curious call.