The whole is only as great as the summer of its parts.

SKATE
Down and Derby
What: Sort out your short shorts for a 1970s roller disco dance party with DJs, drinks, and $5 skate rentals.
Why: Free wheelie.
When: Thurs., 9 p.m.-2 a.m.
Where: The Echoplex, 1154 Glendale Blvd., between Park Ave. & Montana St., Echo Park. For reduced admission, R.S.V.P. to downandderby.org.

MIX
Mindshare L.A.
What: Ponder ten-minute lectures (Kiva founder Jessica Jackley, Tao of Dating author Dr. Alex Benzer, among others) mixed with music and mingling.
Why: You’ve got to give a little to get a little.
When: Thurs., 8:30 p.m.
Where: The Firehouse, 710 S. Santa Fe Ave., at E. Seventh St., Downtown. Tickets online at mindshare.eventbrite.com.

BUY
Zainab Boutique Blowout Sale
What: Deals range $30-$1,000, whether you want to dress up (Azzaro, Alaïa, Jenni Kayne) or down (Shipley & Halmos, Common Projects, Clu).
Why: Wallet yourself go.
When: Thurs., 1-5 p.m.; Fri. & Sat., noon-6 p.m.; Sun., noon-5 p.m.
Where: 8377 W. Third St., at Orlando Ave., West Hollywood (323-655-0515).

CAFFEINATE
The Coffee Bar at H.wood
What: Join the nightspot’s new breakfast club for egg sandwiches, omelets, brunchy bagels, and more without the velvet rope.
Why: At least you’ll be home during the 2-9 a.m. block.
When: Daily, 9 a.m.-4 p.m.
Where: 1738 N. Orange Dr., b/t Hollywood Blvd. & Franklin Ave., Hollywood (323-871-2262).

PLAY
The DailyCandy 100-Day Giveaway, Presented by Comcast.net
What: Claim victory — and astonishing prizes from the likes of Gemma Redux, Rubie Green, and Rebecca Minkoff — after throwing down some simple tic-tac-toe.
Why: It sure beats spending the next five minutes not trying to win anything.
When: You could score each and every day thru Sept. 22.
Where: Online at comcast.net.