S.S.
There is the Cabrillo Pavillion Arts Center in Santa Barbara. It is a Spanish Moorish building right on the beach. The upstairs is a lovely room that is frequently used for wedding receptions. I went to a church service there on Xmas Eve. Here's the link http://www.santabarbaraca.gov/beachfront/pdf/CPACFEES.pdf I don't know if the prices would be considered "inexpensive". But it is a lovely place to have a late afternoon wedding and evening reception.
S.