London - any good tours in October?

Hello, I currently live in Lebanon but will be holidaying for a week in London on the last week of October. I have never been to London before. I definitely will be sightseeing all the tourist destiations around London but I would also like to go out in the evenings.

Q: Are there any tours of note for pub crawls in London? Or any cool casual pub I can hangout at that is safe? I will be residing in the Regent Square area.

Any information or advice would be greatly appreicated. I look forward to exploring London.

Regards, Julie :)