05/10/2012 at 05:55 AM EDT
Keeping a low profile since her January hospitalization
, Heather Locklear
stepped out with a friend for lunch at popular Mexican eatery Casa Vega in Sherman Oaks, Calif.
"Heather was very nice and polite, and seemed to be very happy," an onlooker tells PEOPLE, adding that the former Melrose Place
star and her pal munched on guacamole and tostada chiquitas, while sipping on Arnold Palmers.
Earlier, the actress snuck away for a close-to-home getaway at the Westlake Village Inn, where she was spotted dressed down in gym clothes during breakfast with an unrecognizable guest at the hotel's Mediterraneo eatery. – Jennifer Garcia