It's a random question, but...

どうでもいいんだけどさ、
ちょっと聞きたいんだけどさ、
ところでさ、

It's a random question, but…

深い意味はないんだけど
ただ知りたいんだけど
純粋な興味なんだけど
ちょっと気になってるんだけど

Just wondering, …

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A: Hey, it's a random question, but do you like cats?
I am going to a cat cafe this weekend and do you wanna..
B: No, I won't to go there. I am a dog person.
A: Oh... okay, that's totally fine.