Based on the country you are from, it might be an ordinary act to rub your disposable wooden sticks known as waribashi in Japanese, together to smooth out the texture and to avoid potential splinters, it is actually considered to be very bad manners in Japan. As the action might imply that you believe the restaurant that you're dining at, does not offer quality chopsticks. So do try your best to avoid doing this much as possible. If one is dining at restaurants by hotels such as Park Hotel Kyoto offering some fantastic Kyoto hotel deals, you will find premium quality chopsticks being offered to diners.