Can a Shaiva pray in a Vaishnava Temple?

I live in a place that there are no Shaivite temples, but a few Vaishnava temples, I never went to a Vaishnava temple, can I worship Lord Shiva there? Also if I go to a Vaishnava temple should I remove my Rudraksha? Maha Shivaratri is coming and I can't miss it.