> be 21 male on vacation alone in Waikiki, HI

How can I make some friends for the remainder of my stay? Last night I just walked up to a random girl and started a conversation, and ended up spending the rest of the night talking with her, but our schedules aren't really compatible for the remainder of our stays.

I'm trying the typical social apps like Tinder, Hot or Not, Yik Yak, but many of them take time to get profile exposure, which is obviously limited. Bars and clubs arent really an option here, only restaurants.

Any other ideas?