Recommendations for next weekend (Rome)

Hello, Im visiting Rome next weekend for the first time! Wondering if anyone can recommend me a concert, party or any other activity that is taking place in the city those days.. Ill really appreciate! Ive seen there are concerts at the teatro di marcello, dont know if thats good.. Really looking forward to visit your city! Btw if anyone coming to barcelona now you know someone you can ask for tips too ;) Cheers