We – parents & 3 adult daughters are celebrating a 21st in Paris in May and have 5 days to fill afterwards (21 – 26) prior to visiting Northern Ireland. We were thinking Nice and having day trips to Monaco and Cannes etc but at the time there is a little film festival and a Grand Prix – would it add to the adventure or just be plain stupid to go, we won’t be buying any pricey tickets to events. ?