Riga and its locals are very proud of their Opera House. We have world class opera singers (such as Elīna Garanča, Kristīne Opolais and Egils Siliņš) and world class ballet shows made by such choreographers as Boris Eifman (Russia), Krzysztof Pastor (Poland), Tieri Malande (France) etc. Keeping in mind the level of our Opera I am always glad to see that the price level is rather accessible.
You can also book a table for the break and order a cake and coffee/champagne/juice before the performance not to spoil your break in a line. I also recommend you to use the break for enjoying the architecture if you’re into such things. But keep in mind – you have to dress formally! The thing is – in Latvia we usually dress up. For exams and presentations we like to wear (and see others dressed) in a business casual to business formal outfit. In theaters and concerts as well.
In Opera this is even more important – a suit for guys and a formal dress for ladies is a must. Otherwise, you will be the one feeling uncomfortable in your comfortable jeans. In case you have not taken any formal clothes with you – there is Dressmann just across the street and a shopping mall in the next block.