Since you'll be in La Jolla - I'll give you some suggestions since that's my hood.
1. There's a coffee shop called the livingroom in the heart of La Jolla, the top level which has a separate street entrance is cigar friendly and has a small humidor, mostly arturo fuente.
2. Not too far from there, but a bit inland on Miramar is a Lounge - Churchills - with a great set up, indoors and a legit humidor.
3. If you're like me and want to enjoy a cigar at a great hotel loungey area, I also recomment the Hyatt Aventine on the cusp of La Jolla on the 5, their hotel lobby bar has a cigar friendly outdoor area. The Back Patio at the Flemings Steak House next to the hotel is also Cigar Friendly. About 15-20 minutes away given traffic are my top 2 favorite places for a cigar and cocktail - the Grand Del Mar, which has an outdoor patio alongside the lobby bar ans a small humidor, or the Inn at Rancho Santa Fe has the hunstman whiskey bar with a small outdoor area for cigars.
4. In Del Mar and central San Diego there are a couple excalibur cigar lounges, as well as a second churchills in Old Town San Diego. All of them are pretty good, we've got a few touristy ones in Downtown San Diego, but you'll be disappointed by pricing and selection. If you're in San Diego on a Thursday night, you may want to hit up
@sean and see if our group is smoking that night in East San Diego County.