It unfortunately is up to the venue, not the Fab Four. Some venues have a strict timeline, others let the show go as long as it will go. Generally, shows go about 2.5 to 3 hours total with all 3 sets and an intermission, so for a 7:30 show I would expect it to be done around 10 or 10:30. Add on extra time if you plan to hang out afterwards for the meet and greet that they usually have after shows.
I would call or email the venue though to see if they have any time restrictions (I have seen some venues that restrict the show to 90 minutes total).