How long are you staying? Where are you from? My friend and I went last summer. Since we were traveling on a scholarship, we stayed in inexpensive apartments and walked around. Nice is small, so we didn't get tired. Before our trip, we read the article
https://blog.getboat.com/stories-experiences/cote-dazur-nightlife-bars-clubs-nice-monaco/ and we used the provided tips. We liked Le Bar des Oiseaux, a local bar with free live music. Local musicians often perform there. We started every evening at this bar and then moved on to others. However, if a good band was playing, we could stay at Le Bar des Oiseaux all night. As for clothing, it's worth bringing nicer shoes because not all bars allow sneakers. My friend and I took so many photos in Nice that I don't remember sticking to our budget. I do, however, remember that on the last evening of our trip, we had our first drink at home. I hope you have a wonderful trip!