I don't think its a good idea to have them lock every restart, as Nuclear said people wont be able to go in and buy things if you aren't Awake to unlock the doors, its a loss of business in my opinion.
VU has an entry fee so if people are just walking in without paying then it kinda defeats the point of the business we're trying to make it in to - it's a strip club not a corner shop. There needs to be some kind of exclusivity to it and realistically what strip club is open at 8am
This isn't a bug, the front door to every business is open by default every restart so you don't lose possible customers. If you want it to be changed you can make a suggestion via https://www.roleplay.co.uk/forum/593-gtarp/
Sorry, either we've been unable to reproduce this bug with enough detail, or its not been considered a bug.
Nevertheless, we appreciate your efforts, please do not be discouraged in submitting new bug reports going forward.