SingleSock, sounds like an interesting date! I think you're very brave - I'm always nervous enough meeting someone for a first date without having to meet all their colleagues as well! I like Stupidhead's advice about assuming the best but having the worst tucked away in your pocket!
I don't know what to suggest about whether you tell him you're going on other dates as well. I think personally I wouldn't make a point of telling him (after all, you don't owe him anything) but if he specifically asked, I'd be honest, because I don't like lying. Remember he may be doing the same!
Louby, sounds like another good date. Have you decided whether to go clothes shopping with him today? I'd quite enjoy that - one of my exes had no clothes sense whatsoever, and I loved helping him improve his wardrobe!
Thanks for the advice about the old-fashioned guy. I thought it was a bit of a red flag but it seems not from what the rest of you are saying, so maybe I'll give him a chance. He says he was brought up to stand if a woman comes into the room, which seems really weird to me. I think I'd laugh if he was jumping up and down every time I came into the room with a cup of tea or load of washing or whatever!
Folk, is it your niece's party today? If so, I hope all goes well, and that your brother manages to be polite and friendly to your boyfriend.