My idea of Romance Pack is a little differente:
Expansion type: Game Pack (or expansion pack)
New world: Something similar to Monaco, France, Spain or Italy (one or two apartments + 2 or 3 residential lots + 8 (or more) community lots) - Beach Promenade + Water Channels
New lot type: Cinema (and Theatre maybe if you have Gat Famous)
New transport type: Gondola
New NPC: Chaperone, Matchmaker
New Job: Wedding Organizer
New CAS option: Chemistry (and sexual orientation maybe)
New music: Jazz from TS1 Hot Date and something similar to french and italian romantic music
New interactions: For example - Dance in a duet, more Woohoo options, more proposal, more flirt ect.
New world events: Banquetes (in elegant clubs) and Movie Festivals