Question

A friend and I are going to Barcelona June 15th through 18, then san sebastian for a couple days, then onto south of France (Marseille possibly), and Lyon and Paris for sure. Afterwards I will be traveling solo through wherever I end up, and possibly Croatia (I booked a one way ticket, and I have never been to Europe before) I thought I would fly by the seat of my pants so to speak. Any suggestions for early thirties women, and for just myself, who like food, nightlife, fun fun fun, and true cultural experiences, (not so much museums unless its truly different) Budget is very low, and will only have a couple days in each place. Thank you