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For the store: You'll need to meet Sarah two times. Follow Pamela's path to do this.
You'll need to progress Elsa's questline a bit up till the cafeteria. the store opens after day 40.
For the bar: You have to do Sophia's and Emily's questlines for a bit. It opens after day 42 during the evening/night.

Basically it all comes down to if you're stuck on something check on a bunch of other girls.
In a few days, there will be an update that makes the journal a bit clearer.